Anyone who supports rape should just imagine Tyrone raping them to realize that it's not something anyone should be condoning. Rape is just a pathetic, desperate man's desire for power and control combined with his hormones. Be above that shit.
That being said, as others have mentioned, I doubt more than a handful of the incels here would ever actually rape someone. They can fantasize about it to cope with their lot in life, but they will never do it. I don't support fantasizing about rape either, but at least that aspect of it doesn't actually affect anyone directly, and if these people are so depraved that they need to spam forums about it then perhaps that is the best outlet for them.