@hawkeye10,
Another reason we should be concerned is that about 6 months ago the government (that would be ours) was claiming that one of the biggest reasons the plan to train up Syrians to fight Daesh and Assad was failing was that we had a iron clad rule that everyone who joins had to pass a background check. Only when they set out to do it, devoting plenty of resources to the effort, in many cases it was not possible to get enough documentation with enough reliability to clear people, and that even when they could it often took many months, during which time the potential recruits decided they had better things to do and they gave up.
Now our government says it can check people out before they come, no worries??!!
I call BULLSHIT.
I also have no interest in following the EU stupidity of letting in huge numbers of people and counting on figuring out in time later which ones want to burn the place to the ground.