I don’t think it has much to do with our educational system (as broken as that system is).
I think it has more to do with how the left has completely taken over most of the media. And I’m not just talking about the news. I’m talking about TV shows, movies, etc.
If you hear nothing but one side of the story, you’ll start to believe that one side. Propaganda is effective. Propaganda works, even with intelligent folks. Joseph Goebbels proved that to the world.
It also hard to compete against Santa Claus!