Ok, maybe it was civilization, but it was primitive tribal civilization, not advanced western civilization. And no what the US did wasn’t genocide, it was acts of warfare. The English, and Americans intent was to settle out west, bring western civilization, and have the natives assimilate into American culture and convert to Christianity.
And you can’t call smallpox genocide because it the science of it was not known was never spread intentionally with the intent of wiping out the natives. It was a horrible tragedy but not genocide.
Yeah the trail of tears was bad but that was done under America’s first DEMOCRAT president Andrew Jackson.
As for Harold and William, it was Catholic Church policy that an oath sworn before God must not be broken, which is why the Norman Invasion has a Papal Blessing. So it was legitimate.