I don't appreciate having derogatory phrases "stupid, dumb," falsely attributed to me when I didn't say them. I certainly hope you don't do the same in your chosen profession.
You did not say those words but the tone was clearly talking down to those who send their kids to public schools. A person talks down to the people they think they are either smarter or better than. Your superiority is obvious.
I'm amazed that people still send their children to some strange insecure location to cavort with strange, sometimes dangerous - and always disease-spreading - peers, to be spoon-fed tidbits of factual knowledge dosed with heavy Statist indoctrination.