Because we're literally talking about the native people's of the Americas and their cultures, who happen to be not white and colonialism was spurred on in part due racism.
Hem and haw as much as you like but race and racism plays a large part in how and why contemporary America exists today.
Jesus, shut the fuck up. We get it, you don't think any culture other than your white European culture is worth studying.
Why are Americans so obsessed with race?
Because we're literally talking about the native people's of the Americas and their cultures, who happen to be not white and colonialism was spurred on in part due racism.
Hem and haw as much as you like but race and racism plays a large part in how and why contemporary America exists today.