You are applying a modern mentality on a people and a world from 300 or more years ago.
You do realise that people back then did not think the same way as today?
but in principle its the same.
people go to a country where theyre not really welcome or invited.
decides to stay even though theyre not really welcome or invited.
basically the arabs and the blacks do what the europeans did a few hundred years back.
so how are matt, iron cross etc's ancestors any different?
if anything theyre worse because back then they came with force and guns.
todays immigrants do not, and a lot of them ARE welcome and invited. not by everyone but by society at large.