> Interestingly, there’s also strong circumstantial evidence to suggest that Columbus was Jewish, born in Italy to descendants of Jewish refugees fleeing the Spanish Inquisition (sorry Italian-Americans!). This line of inquiry seems to have gone quiet around when the “slaver, murder, and rapist” version of Columbus came to dominate public perception

I don't see what's the link between his origins and his sins in life. Both can be studied independently regardless of the other. (As long as someone doesn't try to link the fact that he was a "slaver, murder, rapist" alongside being bad in math with the potential fact that he's of jewish origin, that'd be unfortunate).