What happened in America in the 1500’s is something that has ALWAYS happened and will continue to happen all over the world by one group on another group.
One culture/race will move in and superscede the other culture causing chaos and eventually the reduction or elimination of the previous culture.
To say that Coloumbus was the only one is to compeletly ignore the rest of history of the world.
The first time this happened with modern humans as far as we can tell was the “occupation” of Europe by Homo Sapiens Sapiens (Modern Man) over Homo Sapiens Neadertals (Neaderthals).
It has happened, it will happen again.
It’s not like the Indians were peaceful hippies communing with nature. They pretty much moved like locusts and gypsies, when they weren’t scalping each other and eventually the settlers that came here to make a new life. I don’t know about you, but I just wonder how many of us would be miserable in Europe if not for Columbus discovering this great country.