It is. Actually, about a year ago, IIRC, there was some statement from one of these radical groups urging Muslims to take over Europe simply by going there. And the Islamists have made life so miserable in their home countries that nobody can stay.
That said, there are some Christians fleeing Muslim persecution. They’re mostly from the ME and are mostly families or women with children. European states should let them in because they are genuine refugees. Slovakia, I believe, is the only state that is saying it will admit them but not the Muslims (virtually all young single males).
Be careful of even admitting Christians, Taqqiya allows Muslims to deceive.