Bill,

Your point - "... displaced the original natives and then became relatively wealthy exploiting their land..." - is a valid historical fact for the American countries (to include Iberian colonized), as well as for Australia and New Zealand.

All these states, which I'd call colonialized nations, have primary cultures derived from, but different to a greater or lesser extent than the cultures of the original colonizing "parent states". All have at least the form of constitutional democracies.

Other colonializing efforts in Africa and Eurasia failed to take; primarily because not enough indigenous people were displaced and minority settler rule soon evaporated after WWII.

I'd be surprised to see a "lot of adversaries of the U.S., etc." that will be able to "take advantage" of the mainstream "First Nations" movements. We'll have to disagree on that.

Regards

Mike