Yeah. It’s not feasible at all. How would he do that? How would he find all Muslims unless people have to put their religion in a federal database? How would he know if they are telling the truth? We do have to ensure they are never permitted to set up Sharia courts in the US, though. That’s necessary.
You don't think big enough. It's how you implement the task, you put it everywhere, you make them question whether it's worth it to betray us or even live here constantly.
Let's say Mr. Naturalized wants to sponsor cousin Adbulshet to come here from Syria. Mr. Naturalized must first re-swear his Oath of Allegiance at application time:
"I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by the law; that I will perform noncombatant service in the Armed Forces of the United States when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely without any mental reservation or purpose of evasion; so help me God."
And while he's pledging that out loud, Mr. Naturalized is also getting an iris scan.
One example. A million ways to implement.