I'm on her side. You said that he was taking her out to a "classy dinner", and it sounds like she dressed up for it, which means he told her before-hand. She was probably all excited, and then he showed up in his mud-truck with no a/c. Two things can happen there. One, she sweats, which ruins her make-up. Two, she opens a window, and probably ****s up her hair. I can't be positive here, but I know that most chicks don't like it when they go to a lot of effort for you, and then you appear to have gone to none for them.
He had nicer trucks, he should have used one of them. If he wanted to take her out in the B2, he should have chosen a more suitable occasion, and told her ahead of time.
It seems to me that her reaction might have been a bit too strong, but it sounds like he was being a dick. Just my two cents.