I don’t want to really get into this snarl, but I just wanted to say that I have never before heard that the initials “RC” are considered an anti-Catholic slur. As a matter of fact, I have heard from evangelical missionaries that sometimes the people they are “witnessing” to will identify themselves as “RC” to get them to stop.
Well I guess that settles it then. Since you personally have never been insulted by it must mean it doesn't exist.
"I have heard from evangelical missionaries that sometimes the people they are “witnessing” to will identify themselves as “RC” to get them to stop."
How ironic that the irony of a flippant, tounge-in-cheek, inside joke, was lost on them. Its kind of like black people referring to themselves with the "N" word.