Presumably even though there were no border controls, they would kill you if you returned.
Honestly, I’m not sure what the fixation with a guy in a booth is about. Whether you get denied entry and they throw you out, or if they exile or ostracize you, what’s the difference?
Honestly, it seems the same. If a bar doesn’t want Jews in it and the bartender asks everyone if they’re Jewish or a bouncer at the door feels like a distinction without a difference.
There’s no additional liberty, the people who own the bar set the rules.