Geopolitical history is essentially a succession races overtaking the land of other races by force. It is as natural to humans as eating meat. But while this means there is no need for shaming communities whose ancestors have done this (everyones ancestry has done this), this does not mean those whos cultures have been subjugated should not be supported. If the act of invasion is recent, of course there will be grievances, that is as natural as the invasion itself. Once the border is settled, the test for a community that carries these issues is not who should carry the most guilt, but who has the maturity to care for and support those less fortunate in their community, whether their misfortune is through loss of culture, or loss of anything. That is the hallmark of a successful society. Respect and concern for everyone in your community is the challenge of civilization. Everyone is equal.