Let's consider the Poles attitudes towards the Germans that has existed for centuries and how many Catholics acted there towards the Germans.
"Póki swiat swiatem, Polak Niemcowi nie bedzie bratem." This is a Polish proverb, and translated into English it means: "As long as the world will exist, the Pole will never be the German's brother."
In 1990, the then Polish Prime Minister Lech Walesa made his feelings towards his German neighbors publicly known: "I do not even shrink from a statement that is not going to make me popular in Germany: if the Germans destabilize Europe anew, in some way or other, then partition is no longer what will have to be resorted to, but rather that country will have to be erased from the map, pure and simple. East and West have at their disposal the advanced technology necessary to carry this verdict out."
Many years before the differences between Germany and Poland escalated to the point of no return, numerous diplomatic efforts were made by the German government to defuse the ever more dangerous situation the two countries were facing. These efforts were all rejected by Poland. One of them comes to mind: on January 6th, 1939, the German Foreign Minister von Ribbentrop met with the Polish Foreign Minister Josef Beck in Munich to discuss the differences between the two countries. Von Ribbentrop proposed "the following solution: the return of Danzig to Germany. In return, all of Poland's economic interests in this region would be guaranteed, and most generously at that. Germany would be given access to her province of East Prussia by means of an extraterritorial highway and rail line. In return, Germany would guarantee the Corridor and the entire Polish status, in other words, a final and permanent recognition of each nation's borders." Beck replied: "For the first time I am pessimistic..." Particularly in the matter of Danzig I see 'no possibility of cooperation.'"
A leading role in forging the public view in Poland is that of Church clergy there. To read what they taught her followers in Poland is truly blood-curdling. In 1922 the Polish Canon of Posen, prelate Kos, recited a song of hate which he had borrowed from a 1902 drama by Lucjan Rydel, "Jency" (The Prisoners): "Where the German sets down his foot, the earth bleeds for 100 years. Where the German carries water and drinks, wells are foul for 100 years. Where the German breathes, the plague rages for 100 years. Where the German shakes hands, peace breaks down. He cheats the strong, he robs and dominates the weak, and if there were a path leading straight to Heaven, he wouldn't hesitate to dethrone God Himself. And we would even see the German steal the sun from the sky." This is by no means a single, individual case. On August 26th, 1920, the Polish pastor in Adelnau said in a speech: "All Germans residing in Poland ought to be hanged." And another Polish proverb: "Zdechly Niemiec, zdechly pies, mala to roznica jest" - "A croaked German, is a croaked dog, is just a small difference"
Here is the text of another Polish-Catholic war song which was sung in 1848 at the Pan-Slavic Congress in Prague:
"Brothers, take up your scythes! Let us hurry to war!
Poland's oppression is over, we shall tarry no more.
Gather hordes about yourselves. Our enemy, the German, shall fall!
Loot and rob and burn! Let the enemies die a painful death.
He that hangs the German dogs will gain God's reward.
I, the provost, promise you shall attain Heaven for it.
Every sin will be forgiven, even well-planned murder,
If it promotes Polish freedom everywhere.
But curses on the evil one who dares speak well of Germany to us.
Poland shall and must survive. The Pope and God have promised it.
Russia and Prussia must fall. Hail the Polish banner!
So rejoice ye all: Polzka zyje, great and small!"
Not only did some of the priests excel in rhetoric aimed at cultivating dєαdlу hate against Germans during the pre-1939 years, they also prayed in their churches, "O wielk wojn ludów prosimy Cie, Panie! (We pray to you for the great War of Peoples, oh Lord!)"
Sadly, they actively participated in murdering unsuspecting German soldiers. Cardinal Wyszynski confirmed the fact 'that during the war there was not one single Polish priest who did not fight against the Germans with a weapon in his hand.' The war lasted only three short weeks, the German occupation lasted several years. This explains the extraordinary high number of priest-partisans who even were joined by bishops. Further back in history, we find that the Archbishop of Gnesen, around the turn of the 13th century, had the habit of calling the Germans 'dog heads'. He criticized a bishop from Brixen that he would have preached excellently, had he not been a dog-head and a German.
What can one say of the hate that speaks from the pages of one of the more popular papers, the largest Polish newspaper Ilustrowany Kurjer Codzienny, which appeared on April 20th, 1929, in Cracow? "Away with the Germans behind their natural border! Let's get rid of them behind the Oder!" "Silesian Oppeln is Polish to the core; just as all of Silesia and all of Pomerania were Polish before the German onslaught!"
"To absorb all of East Prussia into Poland and to extend our western borders to the Oder and Neisse rivers, that is our goal. It is within reach, and at this moment it is the Polish people's great mission. Our war against Germany will make the world pause in amazement."
"There will be no peace in Europe until all Polish lands shall have been restored completely to Poland, until the name Prussia, being that of a people long since gone, shall have been wiped from the map of Europe, and until the Germans have moved their capital Berlin farther westwards."
On October 1923, Stanislaus Grabski, who later was to become Minister of Public Worship and Instruction, announced: "We want to base our relations on love, but there is one kind of love for one's own people and another kind for strangers. Their percentage is decidedly too high here. Posen [which had been given to Poland after the First World War] can show us one way to reduce that percentage from 14% or even 20% to 1½%. The foreign element will have to see if it would not be better off elsewhere. The Polish land is exclusively for the Poles!"
"(The Germans in Poland) are intelligent enough to realize that in the event of war no enemy on Polish soil will get away alive... The Führer is far away, but the Polish soldiers are close, and in the woods there is no shortage of branches."
"We are ready to make a pact with the devil if he will help us in the battle against Germany. Hear - against Germany, not just against Hitler. In an upcoming war, German blood will be spilled in rivers such as all of world history has never seen before."
"Poland's decision of August 30, 1939 that was the basis for general mobilization marked a turning point in the history of Europe. It forced Hitler to wage war at a time when he hoped to gain further unbloody victories."
Heinz Splittgerber, in his short book Unkenntnis oder Infamie?, quotes a number of Polish sources which reflect the atmosphere in Poland immediately before the hostilities commenced. On August 7th, 1939 the Ilustrowany Kurjer featured an article "which described with provocative effrontery how military units were continually foraying across the border into German territory in order to destroy military installations and to take weapons and tools of the German Wehrmacht back to Poland. Most Polish diplomats and politicians understood that Poland's actions would perforce lead to war. Foreign Minister Beck... tenaciously pursued the bloodthirsty plan of plunging Europe into another great war, since it would presumably result in territorial gains for Poland." He goes on to cite some 14 incidents where Polish soldiers aggressively crossed the border, destroying houses, shooting and killing German farmers and customs officers. One of them: "August 29th: "State Police Offices in Elbing, Köslin and Breslau, Main Customs Office in Beuthen and Gleiwitz: Polish soldiers invade Reich German territory, attack against German customs house, shots taken at German customs officials, Polish machine guns stationed on Reich German territory."
These and many more are the things one must take into account before making the fallacious accusation that Germany was the one to have started WW2, or the Poles were innocent and did nothing to deserve the invasion. The following and preceding quotations are added here to show that not only Poland was bent on war against Germany, but also her ally Great Britain (and France). Although it is still widely believed that Prime Minister Neville Chamberlain on September 29th, 1938 (Munich) honestly tried for peace, one has to consider the possibility that his real goals were somewhat different. Only five months later, on February 22nd, 1939, he let the cat out of the bag when he said in Blackburn: "... During the past two days we have discussed the progress of our arms build-up. The figures are indeed overwhelming, perhaps even to such an extent that the people are no longer able even to comprehend them.... Ships, cannons, planes and ammunition are now pouring out of our dock yards and factories in an ever-increasing torrent..."
The US was supplying the USSR before the war. Why? The Germans, on paper, had an numerically inferior force compared to the Poles, yet rolled up on them despite the Poles being prepared. I'm pretty sure the Soviets would've rolled up on them as well. Poland was a sacrificial lamb for the UK and France so they could get into a war with Germany.
Germany did not "invade Poland". They entered land that was theirs, ripped away unjustly by the Masonic henchmen and handed over to a willing Poland. When the UK and France declared war, it was then that Germany pressed further into Poland, which was a strategic necessity as the USSR was going to invade from the East.
You really should read what the Poles were doing behind the scenes in the post WWI carving up of Europe. Blood was very much on their hands.