It was a combination of a jilted woman, a very biased Title IX hearing, and a pet theory that alleges that "regret equals rape".
A bit more on the whole incident
I was surprised given that I had a similar impression of them as you did.
I've understood them to be a very traditional university that expected much from their students and staff - morally as well as academically.
I'd hope that I'm wrong and it doesn't reflect a leftward political trend elsewhere.