MrShlomo > If they say yes, then you have your answer…
This may not be a final answer. By some, probably very lenient opinions. this religion is not necessarily A”Z for a non-Jew. My personal addition to that is that depends very much on a brand, there is huge difference between Catholics/Protest/Orthodox/Copts, and more divisions in between. Some are more AZ-looking, like Greek/Russian orthodox, some American Protestants may not even be “religious” at all.
So, you would need to have a way longer conversation with that beggar.