I did just a little digging so far, links to links within versions of this "viral" story. So far, I determined that the site first linked to is a small-government-conservative site, no surprise since it's named the Federalist Papers. I did find a quoted UCLA Report PDF document about racial bias incident investigations amongst the faculty and administration, not the student body. When I get time later on I'll back check other links.
In any case, if the story about students protesting a university instructor's grammar/spelling corrections is true, well, it just seems like IRL trolling or Tumblrina spew. It's just not possible for any student of any race to have never experienced seeing teachers' spelling, grammar or factual corrections on their work assignments, going all the way back to first grade.