If you say that the "urge" to rape is determined by genes, you say that it is a disease which would mean that they never had a decision about it.
It's an instinct. My instinct when some guy gets too close to me at a train station is to deck him: now I ask you, given that I am accessing a porn site to talk to you and post this, what are the chances that I have ever actually given in to that instinct? Everyone makes choices every day, thousands of them, and many if not most of those choices are to deliberately restrain our instincts and impulses in favor of acting like humans rather than beasts. Rapists, do not make that choice: they chose to surrender to their base desires and behave like animals. I ate a pork sandwich this morning: are you arguing I'm a murderer?
So you can't stand rape as a fantasy, but you are cool with eugenetics and genetic epuration?
The problem with eugenics is and always has been implementation, not the basic concept. Look at Hawaii, they ran an incredibly successful eugenics program for over 500 years without even knowing what Eugenics WAS: before the dumbass belagana showed up and screwed things up. If you were born with a birth defect, you became food for the shark god: if you violated Kapu, (indicating a mental defect,) you were sacrificed: the list just went on and on.
The results spoke for themselves:
That's a picture of a native Hawaiian from the 1890s: quite a bit AFTER the decline started: and this guy is RIPPED! Compare and contrast a Hawaiian native of today...
I think you get the picture.
"Eugenics" is not what you think it is.
The NAZI's were not running a Eugenics Program: they were committing genocide. There was less than no scientific basis for their assessment of what constituted desirable traits in human beings. Hair Color? Skin Color? Eye Color? IRRELEVANT! Completely, totally, and utterly: IRRELEVANT!* Metabolism? Intellect? Muscular Throughput? Stamina? Social Interaction Potential? Sanity?
Those are relevant: And the Nazis ignored ALL OF THEM.
*(With the trivial exception of insolation tolerance/requirement.)
Humans, like all other species: must evolve or DIE: you either become stronger or weaker, on the path of evolution there is no middle ground: no achievable state of homeostasis. We either continue to evolve, or we begin the spiral of self-destruction which put THESE into the dust bin of history:
What went wrong with this species? It began to self-select for an ultimately unfavorable trait: horns on a burrowing animal.
We're doing the same thing: at present, the ability to commit rape is an evolutionary advantage...
In the short term.
However, the coupled traits of viciousness, callousness, cruelty, and irresponsibility are incredibly destructive over the longer term.
So, what can we do to save our species?
Make that base trait intensely DIS-advantageous evolutionarily speaking.
"The good of the many outweighs the good of the few or the one."
Mr. Spock