You need to talk to your liberal kids. Their heart is the right place, but they need the counsel of their parents to understand the world. It isn't easy overcoming the propaganda they get at school, but with time you can do it.
Revelations come at strange times and places, but one day you wake up and they get it. My son had a prof that was so liberal and abusive that he felt he had to defend the others..and found himself defending his own ideals.