Now, I am thinking about the terrible desecration of Fatima which took place in July, and I am wondering why Catholics stand for it?

In former times, we were tougher than Muslims, Mormans, and Jєωs.

But not today.

But we need to get that toughness back if our religion is going to survive against a system that wants to eradicate it.

Here is how Catholics used to react to threats against our persons and properties, as recounted by the aggressive former Archbishop of New York, "Dagger" John Hughes: https://en.wikipedia.org/wiki/John_Hughes_(archbishop_of_New_York)

"He became known as "Dagger John", both for his following the Catholic practice wherein a bishop precedes his signature with a cross, as well as for his aggressive personality...In 1844 anti-Catholic riots instigated by Nativist agitators threatened to spread to New York from Philadelphia, where two churches had been burned and twelve people had died. Hughes put armed guards at Catholic churches and, after learning a Nativist rally was scheduled to take place in New York, famously told the Nativist sympathizing mayor that "if a single Catholic Church were burned in New York, the city would become a second Moscow" – a reference to the Fire of Moscow.^[10] City leaders took him at his word, and the anti-Catholic faction was not allowed to conduct its rally.

[Note: Napoleon burned Moscow to the ground]
Hughes founded the Ultramontane newspaper the New York Freeman to express his ideas.^[6] In 1850 he delivered an address entitled "The Decline of Protestantism and Its Causes," in which he announced as the ambition of Catholicism "to convert all Pagan nations, and all Protestant nations. . . . Our mission [is] to convert the world –including the inhabitants of the United States – the people of the cities, and the people of the country, . . . the Legislatures, the Senate, the Cabinet, the President, and all!"

They also maintain a strong missionary culture, and young Mormon men take pride in their time as missionaries. Meanwhile the Church all but condemns it. 

The Mormons often take their religion seriously -- we could certainly learn from that!

We can also learn from their "US and THEM" mentality -- they know they don't belong to, or fit in with, the modern world. They are content to be more or less different from the worldlings around them.

As opposed to the NO "it's immodest to stand out" line. 

I think that when you look at Catholic social action, you're pretty much always going to find strong clerical leadership.  It's pretty rarely the case that Catholics just, of their own volition, get up and do whatever.  Kind of comes with the territory.  Sheep and shepherds.
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Even traditionalist clergy don't really do much better than the Novus Ordo clerics with regard to social action.  Part of this is that they are spread very thin, and sometimes have little time or resources to do anything beyond completing their mass circuits.  So I am not trying to dump unneeded criticism on them.  But I nevertheless think there is a pretty noticeable dearth of traditional Catholic clergy rallying the faithful over this or that social evil. 
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They had a problem with burglary.

People try to steal from my local parish Church because they leave it open so that we can pray. I remember once a man tried to steal from the poor box and the Priest, Father C. caught him and immediately the man got down on his knees and said "Bless me, Father, for I have sinned." LOL.

Recently someone tried to steal again but he got nothing. A priest didn't even need to stop him. And the Bishop was so confident that he even wrote about it in the Tablet letting the world know all about it.

Imagine that! Trying to steal from a Church.