Once again, you are right. The ones who want to learn belong in college. Those who do not should be in the workforce. Howver, College is now part of the progression of life and everyone attends. Graduate school is becoming the same. We know the lack of basic skill comes from two sources. The federal governments involvement in lower education and the lack of supplementation of those skills at home. Let the teachers teach.
A university should be a place where students can grow intellectually, a place where they can safely mature. There is no need for physical assaults, verbal abuse or epithets. I know that there isn't many good places left for people who want to be abusive to engage in their destructive conduct, but there never really were many good places in this world for such people. They've always been unhappy.