Honestly, I'm puzzled about what to do.
On the one hand, I'm not sure what's accomplished by publicly posting emails. My impression is this kid has been wronged, making him internet famous blows up his life and compounds that problem. While the story makes me question his judgement, he seemed content and chose to share all this in the context of a job interview. Maybe he left out some details, maybe they found a white sheet in his closet and that's the real reason. Maybe it's an interviewing tactic, maybe another employer would see this in a better light. I don't know.
On the other hand, these emails are insane. He's called a racist for being accepted into a graduate program. After he announces his intent to leave, another professor claims this is an admission of being a white supremacist and thus campus safety policies prohibit him from accessing school resources. They made sure the door hit him hard on the way out. Regardless of anyone's thoughts on diversity, this struck me as extreme. People probably have a right to know faculty treat people this way.
The information I posted about tuition is from their website. I didn't ask him what checks he wrote but assume there were costs involved. If PhD students don't pay full tuition, that probably made it easier for him to walk away.
What's the middle ground between posting his emails here and shutting up about it?