Walkout

On CNN there was a story about a Minnesota student who did not participate in the walk out and it showed a picture of him sitting all alone in the classroom. I can't say what happened across the state or the country but in my class of 27 students 7 walked out and in the class next to mine 5 out of 34 walked out. I could not see where the students gathered from my room and my small sample was anecdotal but what disturbed me was that all of the minority students in these two classes chose to walk out. Is this just one more way that the county is divided along racial lines?