I've actually read studies that say the same thing. I don't know who conducted them, but two groups of men were wired up to EEG's, GSR's, whatever, and shown homosexual videos. The group that said they were straight, but didn't give a crap one way or the other showed little to no sexual stimulation. The group that vociferously hated gays got much more aroused. Don't shoot the messenger.
Wow. Thanks for the precise citation.