Tightening borders and rise of deportation could start Muslim riots and lead to civil war
do you want to fight them now or wait a few more years until there are another 100 million of them to deal with?
Some forces are willing to start a real war in Europe... and this situation with Muslims is a good fire starter. i can't imagin in a short time what can help today's situation with migrants in Europe. But today's situation is not produced by random actions, it was a long time strategy