We can think of solutions in various theoretical ways, but it's not so on the ground. If they don't have a reference that helps them to belong, then they will end up excluding, and through that they get to feel that they belong on the basis of some narrow identity, language or color.
Our democratic societies are in danger. In allowing ourselves to be infiltrated by fear, to be blinded by the passion of identity, we are entertaining the most serious illusions about our freedom.