There are, of course, several characteristics of a gerrymander. Normally, people of a similar mindset could use that word in conversation and understand each other.
Since designations like [LDS/Catholic Caucus] are okie-dokie in the Religion Forum after being well thought out by the RMs and AMs then... well... <shrug> whatever.
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]?
I know you didn't ask me, but I often rush in where lesser fools fear to tread.
I don't see why, in principle, a "Not Protestant" caucus couldn't be declared.
But, WOW it would be exciting to see who thought they had a place in that caucus -- and who agreed or disagreed with them.
As just one for instance, until not too long ago the official name of the Episcopalians was The Protestant Episcopal Church in the United States of America, and certainly in Fielding's time the C of E considered itself Protestant.
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."