One sign of Hitchcock’s Catholicism, IMHO, is that he clearly knew the difference between good and evil. Some of his films can be very dark, and there are evil characters in some of them. But unlike many, if not most, Hollywood directors, Hitchcock never confuses good with evil. That’s one major reason why I admire his films, and over the years have watched most of them.
It was mandated in the old days that crime could not be gotten away with or rewarded on TV or the movies.