@bluedog23, I am so sorry to hear about this situation. It is not easy, and hopefully things will improve over time as he matures and realizes that he will always be loved by you. Others, like @Creekland and @Sweetgum, have given some excellent advice.
As others have said, there is an excellent chance that this had nothing to do with the college attended. It could be related to the friend group, something found on the internet, mental health issues, or some other person/entity that is influential and has led OPās son down his current path. The syllabus that included Dahleen Glantonās column may have been read as a discussion point for construction/deconstruction, not necessarily being presented as gospel. But, in an intellectually rigorous environment, people would hopefully read beyond the clickbait title to see that the jist of the article is that white people have traditionally decried overtly racist behavior and then gone back to live their lives as normal. I sincerely hope that is not such a radical idea that people would feel the need to avoid a university, or types of universities, due to that, which is a feeling that I am getting from several posts in this thread.
It is heartbreaking when we see our child hurting, and even more hurtful when our child makes us a scapegoat for all of their problems. Hopefully the connection between your son and your family will be strengthened again and the family can feel united in love and comfort of each other soon.