I don’t know about screeching. But it was pretty screwed up for a long time. It was only post WWII that Catholic schools stopped trying to beat the left-handedness out of kids. Like the articles says, shrinks thought it was a weakness for a long time. Then of course there’s the language, Latin for left-handed is “sinister” as opposed to “dexter”, and look what we did with those Latin roots. I mean things are better now, but there’s nothing wrong with remembering how it was, because that’s how we keep the pendulum from swinging back, humanity loves to hate the other. And left-handed people were the first other most societies had to kick around.
My mother was one of those Catholics. She ended up being able to perform any task with either her right or her left hand equally well.
I’m a left-handed Catholic but went to public school. My dad was in the USAF and in 1957 we were stationed in England for 5 yrs. My 3rd teacher gave me such a hard time for being a lefty. She made fun of me and picked on me, which is when I started thinking being left handed was a liability. You can’t blame it mainly on the nuns because crappy teachers exist everywhere.
A friend of mine went to Catholic school and the nuns told her that her left-handedness meant she was possessed by the devil. This was in the 1950s.