I agree with that, but as a parent it's gotten harder and harder to counter liberal teaching. I'm not talking completely about what comes from education, but what comes from friends and especially social media. Our sons are honest, intelligent, well educated, with professional jobs, but both are definitely more liberal than my wife and me. I found it hard to counter all the "wisdom" that came from their friends twenty years ago; I can't even imagine the battle parents today have in instilling values that matter.
I guess to support my thoughts about that I'd have to look at the antiwar generation that the Viet Nam war generated. Those kids (my generation) were the children of the people who fought WW2. To me that was something I could never reconcile, and a huge gap in thinking between me and a huge portion of my generation. I don't think you could ever accuse "the greatest generation" of intentionally misguiding or neglecting their children's values, but once the family goes from nuclear to children being fed new ideas by other kids and educators, a lot of wisdom goes down the drain.