The blog obviously isn’t coming from where Scott Aaronson is, and the title of this post isn’t even centrally his question, so I’m asking it.
If you were trying to discredit a demographic policy that discriminated against Islamization, the thing rolled out by the US administration looks like a good way to do it. Shouldn’t selecting against Salafism be the policy core? Such a stance could be easily based upon solid American precedent. This looks like something else entirely. (It’s a dog’s breakfast, which is to say hastily hashed-up populism food.)
ADDED: The flip-side to Scott Aaronson’s concerns (from his own comment thread).