What the hell is this context that you speak of? Defending the country's borders? Defending native industry? Preventing immigration from groups statistically likely to commit terrorist acts?
The statistics on these people committing terrorism is literally zero. Not a single act of terrorism within the United States has been committed by a single person from any of these targeted countries. The statistics are unambiguously clear that you are statistically far more at risk from some white Christian guy who's obsessed with abortion than from some frightened refugee just looking for a roof over her/his head who happens to be of the Muslim faith.