The issue is the ability to distinguish between those who will join the vast majority of immigrants as productive members of society and those that harbour malice intentions.  One of the ways of distinguishing between the two is to rely on background checks.  In countries without functioning governments or those that support terrorists, that becomes extremely difficult.  
While Trump wasn't mentioned directly, he did not state a permanent ban on immigrants from the 6 counties, but a temporary ban as doing the background checks are problematic  and he wanted more assurances that the checks are reliable (one of the saner things he said).  Note, that regardless of what the knee-jerk leftist say, this is not a ban on Muslims.

Labels: moderation: toxicity