What is this "RCC" you speak of?
Are you trying to make some point about how Muslims hold the Blessed Virgin Mary in high regard and how this must be some sort of negative reflection on Catholicism? Is that what you are trying to do?
If this is what you are trying to do, I wonder how far you want to extend this logic. After Muhammad, the person the Muslims hold in the highest regard is Moses. Do you belong to some cult that rejects Moses because the Muslims happen to like him?
No, I’m saying that Mary will be the key building bridge by which the RCC will unite with Muslims.
There were several articles a few months ago from Catholic scholars that are pointing to that direction right now.
Does the thought of Catholicism embracing Muslims offend you?