@CopiousX
The forces that compel people to migrate to Western countries have nothing to do with the local people "wanting them there". Economic realities are often why people uproot to where there are better opportunities. Encountering prejudice and racism comes along with that.
He was fed up that day, and fired back. Him mentioning understanding/speaking German was saying that the bytch ass coward thought he was sneak dissing a newly arrived immigrant. Same way a redneck here would try to mock somebody who they thought didn't understand English.
Germany and other Euro countries have older populations and labor shortages, so working there, this man is probably able to provide for his nuclear family there AND send money back home. Afforded opportunities that do not exist in the country where he is from.