Using the word discovered erases the fact that the indigenous peoples were there first, by thousands of years, and that they're all people of equal humanity to columbus.

Trying to insist that genoese serial child rapist is the discoverer of jack shit is literally telling indigenous folks "our bottom of the grease barrel worst still count more than your most important."

As for the norse, is it any wonder everyone forgets about them when even they forgot about it in the intervening centuries. They literally thought the chick who lead the second expedition was a fictional character meant to represent how batshit insane pagans were before her cool younger brother convinced everyone to be nice and christian instead.