I'm suggesting not bringing more newcomers here without being absolutely certain of their ideological mindset. Since this is very difficult to determine, how about diverting the substantial resources that we would spend on transporting them here plus the cost of housing, medical, food, shelter, education, training, etc. (the list of responsibilities and expenses in bringing them here would be exhaustive) and instead provide for them over there. Same cost to our government (actually the taxpayers) without the additional worries of possible violence (let's be realistic) or drain on our already constrained government agencies.
Problem solved? It's not quite that simple, but I for one would take this scenario in a heartbeat before potentially compromising our national security by trying to help people.
How would you feel if you or a loved one was affected by violence caused by people that we're trying to help?