Our elites claim it is payback for previous acts of colonisation, to be specific.

I rarely hear actual immigrants saying anything like that, unless they are academics who have abandoned their birth culture to suck up to our elites.

Both this, and previous episodes of colonialism, are substantially campaigns of class warfare, with a lesser role as intra-elite conflict. 

They're winning hard presently, judging by the birth rate and the banking and property sectors.