The scary thing is that we know Trump is trolling us but he does say a lot of things that most... no, all of the Republican Presidential Candidates want to say but are to self-aware to say any of it. Well I guess when it's your money you can sprout shit off at will.
I find that having reservations about immigration is not an unpopular opinion. I mean who here would honestly allow a stranger/family to just move into their house? Almost no one and if someone did; I'm sure all of their neighbors would be concerned. Stranger danger and it's a legitimate concern. Also the US is no where as conservative as most other nations with respect to immigration. If Europe closed the doors I certainly would not hold it against them however... I have a strong feeling that most European governments actually want the refugees. Of course they want the ones that will be useful but in this situation that question will have to be dealt with later.