OK, "Columbus Day" is unacceptable, but people in the US aren't going to be like Canadians and call it "Thanksgiving". That would mean there would be two Thanksgivings in the US. We can argue over who "discovered" the Western Hemisphere, which can get interesting.
On the other hand, there pretty much isn't any group in the Western Hemisphere which isn't without some dirt, or gripes. That's why the concept of reparations starts getting interesting. Trust me: reparations have long been discussed and rejected as impossible to implement. And any implementation gets more impossible with the passage of time.
This leaves us with two options.
- Have a frank and open discussion of race and oppression in the Western Hemisphere.
- Trying to accept people for who they are and not what they are.
I go for the second since option 1 has been tried and found to be a failure.