Yes, yes, no everyone lies, no don't get me started about gay people. That being said I have doubts about everyone who claims to be a prophet, I rather think that they must have had a dream, or where very very high. And yes that is with Muhammed and every other prophet from any religion whatsoever.
He's not really comparing being gay to raping, murdering, etc.. I think what he's saying is that if a prophet, especially a Muslim prophet (The Quran condemns homosexuality) was a homosexual, that would cause some obvious problems and contradictions.