I had to go look that up again. It wasn't about this one incident. He wasn't even fired, he resigned after becoming the center of a huge protest movement on campus directed specifically at him (a self-described member of the conservative "Intellectual Dark Web"), then after suing the college for failing to protect him, and the resignation was part of the resulting settlement. Then he did the FOX tour and wrote an op-ed for the Journal and settled into his life as a conservative martyr.

Yeah, he wasn't fired to keep him from complaining about white absence day.