Not my fight, but ...

Intentionally directing attacks against civilians is wrong.

Putting the blame on the British for the genocide of the native americans is naive. One of the issues of the revolutionaries was that the colonist expansion into Indian lands was being limited by Parliament.

Many fought on the side of the British in the American Revolution. Most of the tribes were "relocated" well after the British left. The Cherokee even won at the Supreme Court, but Andrew Jackson decided to violate the Constitution and move them anyway. Etc.