One of the things that were mentioned time and again on CNN during the days leading to the election of the new Pope, was that Cardinal Ratzinger had written a document called "Dominus Iesus" ("The Lord Jesus") in which he allegedly says that Roman Catholicism is the only true religion. While I normally tend to trust the things they say on CNN, I found this statement to be so strongly negative that I wanted to judge for myself. After some research, I found the text of Dominus Iesus (or rather an English translation; my Latin isn't quite up there anymore after ten years of disuse). I haven't had time to read it yet, but I'm putting the link here so I can find it again.
My mother was probably referring to this text when she said that Jesus brings salvation to every human being, and will find a way to each and every person regardless of their religion. I suppose that is a positive interpretation of the text (which, I repeat, I haven't read yet).