That's just the nature of man overall, it's not a general focus on any one particular group. Since the beginning of time man has conquered other men. It wouldn't have mattered who got here first to do what to whom but someone was ultimately coming, that was just a matter of more time. You can be bitter or you can be thankful the indigenous people weren't taken over by an oppressive regime that no matter what period of time in history they'd never to this day considered reparations for the wrongs/injustice perpetrated. Like I've often found myself telling my siblings who hold certain things against my mother, after years of denial she finally admitted her wrongs and apologized, at this point there isn't much more that she can do, the same pretty much applies here.