guess I didn’t think this one through. You are correct. I rescind my suggestion. How about the recitation of “There is no god called Allah and Mohammed is his false prophet” for a test?
Sure.
Or you could just require them to TOUCH pork. Jews refuse to consume it, but nothing is wrong with touching it.
Or, alternatively, you could offer shrimp and bacon-wrapped shrimp — the Jewish guy will refuse both, while the mudslime would eat the plain shrimp.