I don’t know but as long as going at Catholics hammer and tong is an essential activity shouldn’t the alternatives be enumerated and discussed?
Catholics, Protestants and others are free to post any materials that interest them to the Forum, so long as the contents don't fall afoul of FR general guidelines. The Religion Forum is what we all make (or don't make) of it. Catholics are free to post threads about non-Catholic groups (and they do), just as others are free to post threads about Catholicism (and they do), so long as such threads are of the "open" or "ecumenical" varieties.
Generally speaking, all posters should avoid making threads and posts personal. Everyone should discuss the topic and not the poster, nor his/her imagined "agendas" for posting something. Either prove/disprove the post content, or learn to ignore it.
If a poster gets his/her feelings hurt because others ridicule or disapprove or hate what that poster holds dear, then that poster is probably too thin-skinned to be involved in "open" Religion Forum threads. Old-timers in the Religion Forum know that "open" threads often lead to heated and often contentious debate. Antagonism should be expected in "open" threads, and a thick skin is always required (and expected) to participate effectively. Failure to operate with a thick(er) skin usually drags the debate into a flame war.
As an alternative, any poster may choose to ignore/avoid "open" threads altogether, and instead post within threads labeled "prayer", "devotional", "caucus" or "ecumenical." And if they can't find such a thread, they can always post one for themselves and enjoy Moderator protection, so long as the thread stays within the posting guidelines of the Religion Forum.