[Religion Moderator]

Just out of curiosity, can I post a thread [Not Protestant Caucus]? If not, why not? And how would it be any different than a thread designated [LDS/Catholic Caucus]?

Yes, you can post a "not-Protestant Caucus" just be careful not to use the caucus as cover to disparage or speak for the non-members, i.e. Protestants.

Catholics, Orthodox, Jewish, Muslim, LDS, Scientologists, Agnostics/Atheists, Buddists, Diests, New Agers, Non-denominationals, etc. could post in your "not-Protestant Caucus."

Only LDS and Catholics could post in your "LDS/Catholic Caucus."

[delacoert]

Yes, you can post a "not-Protestant Caucus" just be careful not to use the caucus as cover …

I suppose that was the only answer left... the only option left once you've painted yourself into a corner is to define your space as non-Euclidean.