Trump is an idiot, and this is ridiculous, BUT Hillary will drastically increase the number of refugees from Middle Eastern countries and open the border to illegal immigrants. ISIS has stated explicitly that they sneak their members into Western countries as refugees.
I have no doubt that under a Hillary presidency, Islamic terrorist attacks on U.S. soil will increase exponentially.
If the West closes their borders to the refugee crisis, an entire generation of Syrians will be ripe for radicalization. This is a far greater threat to our country than the few terrorists who will enter as Syrian refugees. ISIS wants to promote a war between Islam and the West. Welcoming and caring for these refugees neutralizes their rhetoric.