How to Talk to Parents
Parents are a pretty sensitive group.
Perhaps because they themselves are the Kings of the Judgers, parents are more attuned to perceived slights than most. No group of people is more “victimized” than parents — and the word “victimized” is in quotes for exactly the reason you think it is.
These days, there’s just not a lot you can get away with saying to or about moms and dads without someone getting offended. You have to use your words very carefully.
You’d probably have better luck suggesting that Hitler had some good ideas than saying just about anything about parenting to a parent.