Fine. People who have comfortable lives and future prospects don't usually go and blow themselves up. Terrorism isn't caused by religion, it's caused by poverty and desperation. ISIS didn't come about because 'lol Muslims', it came about because there's been a near nonstop war in the region since 2003 (and since 1979 in Afghanistan, and then the whole Israel thing).
I've said this in other threads before, but the whole ISIS things has a lot of parallels with the Russian Revolution. ISIS and the Bolsheviks operate in very similar ways. They show up, make an example of some scapegoats (usually representatives of the ineffective government), take over government services, run them relatively competently, and violently dispose of any dissenters. Both used an ideology to gain traction with a thoroughly disenfranchised population with little hope for the future and blamed the problems on some Other. The biggest differences are the ideologies used (for Russia, it was Communism, and for the ME, it's Islam), and the fact that Lenin was a lot more competent a general than al-Baghdadi is.
Now, here's the thing: if you can offer all the refugees fleeing the war the chance to make themselves safe and comfortable lives in the West, then you're not likely to see many of them turn to terrorism. They'll have no cause to. What do you think will happen if you make them turn around and go back to the war-torn ****hole they came from, where they have no future? Why, they might become quite receptive to the notion that their problems are caused by the West. Maybe they'll want to do something about it.
Why do you think countries like Saudia Arabia, Iran, the UAE, and Jordan don't have huge problems with domestic terrorism? I mean, if Muslims are a security issue in Western countries even in their small numbers, shouldn't these countries, which are almost entirely Muslim, be crawling with terrorists?
Terrorism represents a failure of government, not religion.
Phantom_Hoover also made a similar case once or twice using The Troubles as an example.
Getting your news from Presidential campaign speeches isn't a very good way to stay informed about the world. Try reading European news sources, or talking to people -- like Sandwich -- who are actually from Europe.
I thought Sandwich was from Israel?