we know that bad things happened world wide for the world to be the way it is today.
the usa wouldn't be as powerful it wasn't for slavery. but we aren't having a pro slavery day.
the usa wouldn't be as large as it was if it wasn't for the genocide we committed across the nation, but we don't have a manifest destiny day.
columbus was the first person amongst many in his era that lead to the discovery of the new world.. but we shouldn't celebrate him as a person because he carried himself horrible, even compared to other conquistadors and explorers. he was one of the most cruel amongst them.
had he actually found india, he would have been castrated and his head would not even have made it back to spain.