Different mentality back then. I played high school in the late ’60s and Lehigh early 70s. Wasn’t unusual for a coach to hit a player “to get his attention”. I remember Whitehead knocking a player to the ground in practice one day, when he was the OL coach. Different times, but really no reason to be abusive to make a point. If a person can only communicate a point by using violence, he’s got a problem.