Yes. Actions have consequences.
Listen, we don't know why this owner refused service. He could merely hate Marines or any military. That is wrong. But if he has had a string of bad experiences with Marines trashing his bar then no, I don't expect him to tolerate that and I don't think the Marines as a group would expect him to have to.
I'm not questioning whether this place offered or refused service. This is still gossip at this point.
I'm questioning your logic.
Discipline from a ranks authority is nothing to compare to a civilian operation discriminating.
The two are not comparable.
At this point, from the way you speak, you having a son in the MIL is now gossip.