That'd be discrimination against a protected class at a place of public accommodation.

This is more like dropping a person from club membership due to incompatible views or behaviors.

The question is not about what is defined as protected class, but why we needed to start protect religious freedom. Allowing people to escalate disagreements in one issue into sabotage of each other, leads to hostility and all out war.

California makes political view a protected class.

In fact, in 1986, the California ACLU sued a restaurant for excluding Nazis, under California anti-discrimination laws.

The restaurant settled.

http://volokh.com/2006/02/24/a-very-strange-but-true-aclu-ca...

It's not as cut-and-dried as you suggest. Individuals--but not broad classes of people--can be excluded based on their behavior. The Nazis likely could be excluded as long as they insisted on wearing Nazi pins/garb, but not merely on suspicion of their beliefs. A spineless out-of-court settlement by an insurer doesn't tell us that much about how the case might have fared in court, only that the insurer chose to avoid further risk.

I think the more interesting part is that the ACLU was committed so strongly to non-discrimination in 1986.

And I agree the settlement doesn’t prove the claim was valid. But why would protection matter less when you’re wearing the garb of the political view you’re trying to express?

If the law is trying to protect unpopular political views from being excluded in public services, it matters the most precisely when they’re wearing MAGA hats or Newsom 2022 pins.