It’s not censorship. Censorship is something demanded of by a government. As a business owner if you use the assets of my business I am passively participating and enabling you to spread your message. If I find out what you do is horrible I have the right to retract any level of my participation from your endeavor. You are still allowed to say whatever you want but I am NOT compelled to help you even passively.

We have protected classes to stop people from uaing this right to exile vulnerable groups from being able to use all servicea in society this way as a counter measure to this right but if the form of removal is not based automatically out of what body you are walking around in or what your religious beliefs are and the ban doesn’t apply unilaterally to all members of your group for that sole reason - then it is valid.