Well, it does give us old timers another chapter to RF history. The DIR rush of '14. Years ago there was a period when people started to get very suspicious of Mormon members, and what used to a decent sized Mormon community (especially for a site not dedicated to it) dwindled in size and left only a few. And of course there are times when people start being especially mean to a certain group. Theists tend to get that one more than others.
But, yeah, it would have to a subforum divided up into several smaller forums, which, given the no-use status of the rainbow room, I don't see much potential for use in a GLBT DIR. And as you mentioned, breaking it down to appropriate individual groups would be a mess. Though I see making the Rainbow Room a non-members only sub forum that DIR rules apply to. Maybe even a new catagory of subforum for "polite discussions" that could house all the new DIR stuff that does not relate to religious things but still deserves its own time for discussion of members.