The reality is that many of them make bad choices in their own country, they choose politicians who promise to get their hands on the public treasury to give it away in all kinds of subsidies, and after breaking up one country they go to another, but they have not changed in absolute, and demand in a foreign country many of the same things that caused their country collapse.
It is not about racism, it is about reality, this is a fact and it does not matter where the immigrants come from, the United States lived in the past the same problems, but with the Irish and Italian immigrants, who had large numbers of their population deeply linked to the mafia.