We've all been rejected or have had to turn someone down at some point. It's not fun for either party, but when you gotta do it, you gotta do it. Once when I turned someone down I was told that they were too good for me anyway, another said I made them hurt themselves because I didn't love them back, and one assumed I must be a lesbian since I didn't want to be with him. Solid logic.
I've been lucky enough to avoid anything worse than that so far, but the reality is that no one is meaner than someone dealing with rejection. Especially men. Sorry. And this guy is proof that some of the "nice" guys are actually the worst people out there.