I think the Germans have proven they know how to build concentration camps.
Put the ones that manage to make it to Germany in a camp and have the UN set up safe zones in Syria, then ship them all back to their home country.
Only a fool would let these people run free in the general population.
I'm afraid, literally, that that is just the thinking of the ruling Euro elites. And once they are established in the we-have-no-borders Europe, the unknown Moslem extremists among them will be free to hop a plane to visit the Great Satan USA.