>If Britain had not committed the grave crime of colonialism and imposed it's language on the globe people from far flung places might not now be colonizing britain.

If that were the defining line you'd see it for a lot of places and contexts other than just the west no?. Including let's say the arab empires but berbers and co aren't "recolonising" north africa let alone Saudi Arabia or Yemen and the Ful, Masalit, etc are continuing to be wiped out in Sudan rather than Sudan being taken over by non arabs.