There’s no mixed legacy. They hate the Christianity that Columbus brought. Anything else that they say is a lie.
Columbus did amazing things, and his skills as a seaman were almost remarkable, even by today's standards. Even in his day, people marveled at his abilities on the ocean.
But as an administrator, he was terrible. Even his brothers and friends had to admit that he committed atrocities.
King Ferdinand and Queen Isabella had him removed as Governor and thrown in prison because of his cruelties and his incompetence. After Columbus, Portugal and Spain tried to pass laws against maltreatment of the natives.
I am not making this up, you can research it for yourself.
Now, there are Libs who want to tell us that everything was Utopia before Columbus and the Europeans, which is a bald face lie. The natives were sinful people, and quite savage themselves.