I don't think he is arguing that the University is not making an effort to make minorities feel welcomed. I think he is arguing that the reality of the situation is that in a community where you are culturally and racially unlike the majority of the people, you don't feel as comfortable as when you are. I didn't really take his comments as a slight against the University's efforts or policies, more toward the inherent tendencies of current society.
One thing, maybe I'm just being oversensitive, but personally, I felt like the use of "white school" in the article was a negative term. Basically I felt like it was an attack on the white people at the school almost lumping everyone into a group that is closed and bigoted toward minorities. Like I said, maybe I'm being oversensitive, but that was my initial reaction to the term in the article.