Just because they are educated does not mean they can't cause harm. Actually it makes it more likely.

Just because they are injured does not mean they don't have the ability to cause violence.

It doesn't matter if they affect the economy well if it causes ISIS to react.

More than 4,000 trained gunman have been smuggled into Europe already.

21 percent of Syrians support ISIS, as many as 4.6 million would be supporters. With a portion entering if decided to to so.