"I agree, but wouldn't that same logic apply to the people who worked on Covid in the lab in China, where it escaped from?"
Yes. But what if it's release was intentional?
"Yes, but that's no excuse for what he personally did to native people"
He did nothing horrible to the native people other than killing some cannibals who had been eating the indigenous people whom Columbus had established trade with.
"How do you know none of them are true?"
There were records kept by many of his crew and by those who worked with him after he was made governor.
"It's a known fact of history that Spanish Catholics did do some pretty horrible things to native people in California and the Southwest, Central America, South America, etc."
Yes, that is true. But that does not mean that Columbus was one of them. Plus Columbus was Italian and not Spanish. The horrible things that happened are inexcusable and reflect poorly on Christianity.
However, it should not imply that ALL Catholics and other Christians behaved in a similar manner. Most people actually listened to the messages that Jesus taught, even if the Church was drunk with power and did not.
"The Wikipedia article does mention that he was reluctant to convert the native people to Catholicism, because then he wouldn't be able to justify exploiting them for labor, and that upset some of the Catholics in his group. If that's true, then that's horrible."
Wikipedia is wrong. This is not the first time they've been wrong. They have a very left leaning bias and always have. It is the left who has promoted this revisionist history that paints Columbus as a bad man.
"Not even close to everyone on the left"
I wish that was true but it certainly doesn't appear that way from where I and many other conservatives are sitting.