Twixes, I think (not sure) the not-legally-rape victim in this case went to a Protestant school. There is a strong tradition of protesting in the nationalist community (civil rights marches etc). Many of the names on the twitter #ibelieveher are Irish and therefore probably Catholic. Which may be where the "Republican bitches" (or whatever slurs you have seen) come in. I believe these people are objecting not because the men involved in the case are Protestant, but because they are nasty misogynists, and because the protesters have a social conscience and some feeling for their fellow (wo)man, not because they're taking the opportunity to kick the posh Prods. As a (lapsed) Protestant, I'm happy to join them.