They can be that mad, though. There was an American case a couple of years ago (?) at a mall with CCTV. Another male jogger. Just punched a bloke in the face for no reason. The victim fell, landed on his head and died. Plenty of witnesses said there'd been no interaction at all between the two men before that.
Agree that a lot of men just hate women in general, though, and we're an easier target.
Remember the recent one in Dublin? Just casually stabbed a girl walking past. I have no idea whether there've always been crazy murderers walking/jogging around doing this to random strangers, or if it's new.