I seriously don't understand people who defend race-based admissions. It is, at best, an ends-justify-the-means argument where you're saying some forms of racism and stereotyping are acceptable. I'm aware of the argument that it is to offset systemic racism but it still boils down to assuming someone's life story based on the color of their skin.
I'm very pro-diversity but this is just too high a price to pay. Everyone in the rainbow classroom will look around and know that the bars were different. They just won't say it out loud for fear of social reprisals.
Furthermore, based on my college experiences, the issue with diversity in college isn't even the lack of it. It's the lack of integration. You still end up seeing the various racial groups sticking to themselves. Whatever benefits diversity brings is probably diluted until that is resolved.