And a united Europe will also manage to send hundreds of thousands of migrants, who don't have the right to asylum, back to their homelands. Though that, given the number of flights necessary, would be of a scale reminiscent of the Berlin Airlift.
There are also people that still choose to support racist rhetoric because they feel white dominance in America is slipping through their fingers. To them, "diversity" is a codeword for white genocide. They claim that their "homelands" are being overrun by minorities and are desperate for solutions that ensure their "white survival. " This fear, of course, is irrational and solely based on a loss of white power and control.
Our power lies in our love of our homelands.
If we take the pope at his word and socialism is highly preferable to capitalism and he was really concerned about these people, he would demand they go home. He would demand they return to their homelands wherever they are, if they were socialist.