I typically agree with much of what David Brooks has to say. However, I'm afraid that he was way off the mark with his article "How Covenants Make Us." Demographic diversity in the United States is a good thing. The problem has to do with the lack of integration and assimilation of demographically diverse communities.
The board of education had proposed a set of policies to make Michigan schools more inclusive for students, should they be adopted by the local school boards. They were developed by the State Board of Education in response to requests from school districts and parents. The ACLU statement was in response to the uproar which ensued after they were released.