Excellent piece by the late/great Solange Hertz on Columbus is seen here: https://www.tumblarhouse.com/blogs/news/discovering-columbus  In it she makes reference to the work of William Thomas Walsh.  Below is a an excerpt from her work.

The political situation became so unstable that Isabella reluctantly decided on the expulsion of all Jєωs who would not be baptized as the only realistic means of keeping the peace and protecting the Jєωs themselves from massacre. She decreed the death penalty for anyone harming them in person or property, and was known to extend the date of their departure wherever special circuмstances warranted. There is little doubt about where Columbus stood in the matter, for a marginal note in his own hand to a prophecy of Esdras which he believed pertained to America, he wrote that only “reprobate Jєωs” would not accept the prophecy, whereas “it has been accepted by the innumerable ones who have believed in the Gospels. Israel has thus been split into two branches.” Whatever his racial antecedents, Columbus was unquestionably a Catholic.

In opting for deportation, Spain was actually far behind other Christian nations. Jєωs had been expelled from England in 1290, a full 200 years before; France had expelled them in 1306, and Germany in 1348. The first Inquisition was not established in Spain, but very much earlier, in 1233 in France, whose example was eventually followed not only by Catholic countries, but Protestant ones as well. Like the others, the Inquisition for which Isabella petitioned Rome had jurisdiction only over Catholics. It was never directed against Jєωs as such, for unless these declared themselves Catholic, the tribunal had no authority to try them. Professed Mohammedans were equally exempt.

Punishment was meted out only to those found guilty of professing the Faith falsely, and who need never have done so. Even so, actual executions were relatively few. In Isabella of Spain, the Last Crusader, William Thomas Walsh remarks in Chapter 19,

In the long run the Spanish Inquisition proved to be a life-saving organism, in the sense that it averted more deaths than it caused. Not only was Spain free from the terrible religious wars that cost hundreds of thousands of lives in countries where Protestantism obtained a foothold, but she escaped almost completely the terrors of witch burning, which claimed 100,000 victims in Germany and 30,000 in Great Britain.

Whatever his background, Columbus the man has yet to be discovered, for after five centuries what is known about him still exceeds anything that is known for certain. Posterity does not even know what he looked like.

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What happened in the 15th and 16th centuries is one thing. What happened 500 years later is quite another.
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Here in the good ol' USA, the libtards got busy in the 1960s, 70s and 80s preparing for the Quincentennial of Columbus.
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They maligned his name, filled history books with lies about his persecution and subjugation of subhuman natives.
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They built it up into a frenzy such that Columbus Day had become quite distasteful to an entire generation.
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They did this so that when 1992 came along nobody would want to celebrate 500 years since Columbus sailed the ocean blue.
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And so it was.
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1992 came and went and there was hardly a mention anywhere in the MSM of the fact that it had been 500 years.
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The only way you would know it was if you did the math on a piece of scratch paper, or punched it out on a calculator:
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