I'm tired of this comparison of discrimination against speech to discrimination against protected classes. Please learn the difference between the two.

The person isn't being banned. Their activities are. This is legal, and always has been. Without it, someone could disrupt religious services with obscenity or blasphemy and there would be no recourse, to take just one example.

The above is entirely unlike discrimination against people on the basis of race or sex or orientation or religion because those are unchangeable characteristics.