The full version is - "There will always be rape because all men are rapists".

Right. Ok. Just to clarify, I am seeing this saying "All men are rapists and therefore, all men will always rape and have always raped."

I think this statement's a bit too inclusive. Allow me to retort: I could be considered a man. I am not a rapist. I do not rape. I have not raped.

Well, no huge long argument here. If you trust my statement of non-rapism above, I've just disproved the entire concept. End of story. However, allow me to correct the "all men are rapists" statement:

Some men are rapists. They really, really suck, and should be hurt. Badly.