Apparently the author of the essay disputes it.  Or so I assume, given he/she didn't give a word to the very reasons for why so many Americans (and Europeans) are now, after a long era of being very open to Muslim immigration,  see a need to temporarily stop immigration from radicalized nations until we can be assured such immigrants pose no more threat to the nation than an immigrant from Iceland.

I can only respond to the essay, not to what others believe the author believes, but didn't bother to say in the essay.

I apologize for not citing the author's name every time I refer to him/her, or being able to read his/her mind.

I am only responding to the essay, and what the author actually says, and the message he/she conveys (as I understand it).