Presumably fine. Why would you let infidels into a holy place? While persecuting people for circumstances of their birth is IMHO a moral wrong, adults are free

Presumably fine. Why would you let infidels into a holy place? While persecuting people for circumstances of their birth is IMHO a moral wrong, adults are free to choose their religion (in "secular" countries like the US at least). The entails a set of beliefs, privileges and responsibilities. Whether or not it's fair, border security in a lot of places is anti-Muslim. It's part of the belief system of border agents and (some) voters. Islam and not-Islam are at odds here, just as they are in Mecca. I especially feel sorry for non-religious "Arab-looking" people who get caught up in this.