You realize it's more offensive because he doesn't think they're gay, right? Or do you really misunderstand the whole fundamental concept?
Also, Cannibal Corpse are hacks.
I think you misunderstood the whole fundamental concept. It's hyperbole. His speech is intended to sound completely overblown and overly offensive and ridiculous. You're free to not like the theatrics, but that doesn't make them any more serious in context.