I think we can tag in the Paradox of Tolerance with a side of Nazi Bar on this one.
This type of "they're intolerant, but polite" shit needs to get nipped in the bud because it metastasizes quickly, and sends out a batsignal to other intolerant groups that this will make a fine home base so long as they hide their power levels.
Cool. But why don't we do it proactively? Like let's go find these people that think the Bad Things. We can even wear matching shirts - I'll go order them. Come on guys. We cannot rest while there are Bad Thoughts out there being thought by Bad People.