The author starts on a strong premise, then quickly stumbles into the common rhetorical trap of validating his enemy's premise.

He opens by correctly linking the Jєωιѕн-invented moral category of "racism," with the Jєωs' own obsession with their own elevated racial status over and above the unwashed goyim whom they view as cattle. This is part-and-parcel of the Jєωs' tendency toward projection. They leech Christendom dry through centuries of usury, then come up with Communism as a cure for "economic injustice." They push feminist "rape culture" narratives after creating that culture through pornography. And they have the absolute gall to cook up the secular sin of "racism," whilst adhering to a belief that their race is intrinsically more valuable than the goyim whose sole reason for existence is - they believe - to serve Jєωs.

But the author of the article never gets that far. Instead he opts to validate the Jєωιѕн invented moral category of "racism" with his own pet variation of the retarded "da dems are da real racists!" trope, this time swapping "protestants" for dems / libs / etc. Whether this guy wants to admit it or not, Catholics engaged in the slave trade as well. Catholic laypeople and clerics and religious owned African slaves. Catholic France outlawed miscegenation in her colonies and motherland in the 18th Century - significantly, this ban was only lifted after the godless French Republic was established. Even in Spain's colonies, where miscegenation was not so uncommon, there was the specific circuмstance of large numbers of Spanish men stationed thousands of miles from home with no Spanish women to marry. Miscegenation was therefore tolerated as an expediency. But even then, it was not the norm. Where possible, people married their own kind. The fact that so many Mexicans, and Central and South Americans - to this very day - are either full-blooded European, full-blooded Indian, or full-blooded negro, testifies to this fact.

Jefferson Davis, for what it is worth, had a very warm regard for Catholics. He was educated by Dominicans, carried on correspondence with Pope Pius IX (who recognized Davis as a head of State, addressing him as "President"), kept and cherished the Rosary Beads which the Holy Father blessed and sent to him, and, there is reason to believe he may have converted before his death.

That digression aside, it's worth noting that prejudices are perfectly natural and universal. Racial prejudices are natural and universal in any multi-racial society (which is itself the unnatural condition). Ask anyone familiar with life in countries like Colombia, or Mexico, or the Dominican Republic. Racial prejudices are alive and well in those places - a de facto racially-based class and segregation system is in full vigor, and, in short, the countries are every bit as "racist" as America allegedly was prior to WWII. The only difference is that these nations had nothing close to the amount of Jєωιѕн subversion and racial rabble-rousing that America has had to suffer from for the past century, and that is something that can rightly be laid at the feet of English Protestants, going back at least to the infelicitous era of that bastard Cromwell who, when he wasn't slaughtering Irish Catholics, was busy welcoming the Jєωs into Great Britain with open arms, three and a half centuries after the Edict of Expulsion.

TL:DR - "Racism" is a Jєωιѕн invention, meant to undermine, silence, and weaken Europeans and their colonial descendants, by lumping normal and inevitable racial prejudices, preferences and the inevitable tensions and acrimonies which arise in multi-racial societies together under the invented "sin" of "racism." This is classic Jєωιѕн projection, as no system of belief conforms more closely to the "elevation of race to idolatrous levels" condemned by Pius XI in Mit Brennender Sorge, than does the Jєωs' own conception of themselves as "the Chosen People, " and literally everyone else on earth as "goy" cattle.