I explained things for a long time once I realized how brainwashed he had become. He left the conversation more doubtful about his professors' motives, thank goodness.  He also spouted off a lot about humankind being one community, so I asked him to watch a lot of videos about the chaos in Europe because of UN-forced migration, and I gave him a lot of common-sense analogies to bring his idea of utopia back into reality. We ought to take our kids out of secular colleges. Let capitalism do its trick.