I went to Catholic grammar school and high school in the 1950s and 1960s. We were taught by two different orders of nuns. I never saw any evidence of horror or even concern about them. They were strict of course [as well as kind and supporting], but they never laid a hand on any of us. It was only in high school that I came across one angry nun who didn't like any of us---but she never harmed anyone. I think this sort of thing is based on maybe true, maybe false, maybe exaggerated stories about teaching nuns. In any case, the Hollywood anti-Catholic sentiment appears alive and well.