The Native Americans' land was stolen, their way of life destroyed, and their pride taken.
Abuse is an understatement. With anarchy reining, deaths were inevitable.
I don't see the average person obtaining a rocket and space shuttle or even taking a ride on them.
The Chinese on the other hand was just hated for being different and strange.
It was definitely racism.
One thing you can say is that Star Trek was bloody good at doing the whole anti racism thing.
Chinese guy in control of the ship,
Black woman on communications
Alien as co captain