If by citizens and non-citizens you mean.....
The original quote I responded to was: "in terms of "extreme vetting", a good policy would be to refuse immigration to any family where the women cover their hair with the hijab, chador or burka."
This quote did not specifically mention where this immigrant family is or the family's specific status. Everything I have posted is legally consistent with the general nature of that quote.
Both of us may have assumed too much in regards to the specific meaning of that quote. If he chooses to clarify that statement, perhaps we would find that we are actually in agreement.