The question to ask is, what kind of people are rapists? Just men in general? That's awfully vague. Can't we find a more useful classification?
Well I have an answer. It turns out, they're the same kind of people who make false rape accusations.
Cluster B types, specifically NPD (mainly), ASPD, HPD and to a lesser extent BPD (for the false accusation part).
Turns out most SJWs are NPD/HPD.
A common behavior of NPD/HPD types is their tendency to
projection.
They accuse others of what they are inclined to do, or are actually doing, because they have very little sense of empathy, and are generally unable to put themselves in other people's shoes. Thus they can only imagine other people believe and behave exactly like them. Since as good psychopaths they'd rape and kill if they could get away with it, they assume we humans would as well.
Go read
/r/raisedbynarcissists
to see what it's like to live with narcissists. Gives a good idea of what these people are. They're just not quite human.