I don't think anyone is saying that Roosh wants rape. Only that he wants (many instances of) rape to be legal. Which is in fact what he wants (or, at least, what he says he wants; he may not be sincere).

There is a risk of the noncentral fallacy here -- if someone proposes to make a small minority of atypical instances of something legal, that's not fairly described by saying they want to legalize whatever-it-is. But AIUI most rapes are committed on private property, even if (as I can imagine Roosh might want to) you take "rape" to imply outright nonconsent and force or threat or the like. (I confess I don't have statistics to hand to back up this claim.) If I'm right about this, then Roosh is proposing to legalize most rapes, and I think it's reasonable to describe that by saying he want to legalize rape.

I'm sure it's true[1] that he wants to do this because he sees bad side-effects of the illegality of rape, rather than because he would like there to be more rape. But I think this is very often the case when people propose to legalize things, and therefore saying "Roosh proposes to legalize rape" doesn't amount to claiming he likes rape.

[1] Or at least true-according-to-what-he-says; again, he might not be sincere.