The fact is, when you really get down to it, most people are subconsciously racist. Not a joke - most people. There have been studies on it and everything.
The real injustice is that my black students cannot earn or learn their way out of being black in America. A Caltech education doesn't help when you're pulled over by the cops. This blogger's ability to use "Hence" in a literature review won't help either.
If this is true, why the moral outrage towards the professor?
2) The professor should be better at their job (I say as a prof). I accuse students of plagiarism only if I have proof, and the last 4 times it's happened I've been able to highlight passages and provide the citation of the original paper, with the page number. Or I can show the student their peer's paper with the same exact sentences and typos. I'm sure it's plagiarism. If I can't prove it, I poke around. I ask the student to come in and describe their process to me, talk through their notes. This works. People crack, or they reveal their legit process. Sometimes that legit process includes a crappy first draft that got immensely better via four sessions with the Writing Center. Great. Sometimes their not-quite-legit process involves too much help from their girlfriend. Then we have a talk about what's appropriate and how they can rectify the situation.
As such, we can recognize the harmful effect of fallacies such as racial prejudice, both on ourselves and on society as a whole, and utilize our ability as sentient beings to avoid such behavior.