I think that although a lot of men wouldn't themselves dream of having sex without active, enthusiastic participation of their partner, they would not feel that other men, who are prepared to do so, are rapists.
So although they themselves may not have the entitlement affliction, they don't quarrel with other men's entitlement. They see it as something not for them, even not very top-notch behaviour perhaps, but not "rape-rape", surely?
So that's why these FB hate-speak pages can exist. Because although men may not wnat to exercise their own entitlement to have sex with a less than enthusiastic woman, they are not prepared to take away their brother's entitlement to do so.
We need to start looking at "ordinary" men's attitudes to sex and rape. Because the ordinary attitudes, are what enable rapists, to rape. 6% conviction rate for reported rapes and most rapes not reported at all. That happens in a context and it's that context we need to dismantle.