But gravity wouldn't affect, ahem, one's disposition, but evolution would. That's the problem.
Let's try a more exact analogy. I believe that gravity causes planes to crash. I believe that plane crashes shouldn't happen, 'cos they kill people. I believe in gravity. Moreover, I believe that the theory of gravity, and gravity itself, are morally neutral. No contradiction is involved.
---
By the way, I don't think you've spelled out the connection between evolution and rape. How would rape evolve, in your opinion?
---
Finally, you seem to be committing the "naturalistic fallacy" on behalf of evolutionists. Just because I believe something is
natural, and indeed that it evolved (e.g. polio) doesn't mean that I wouldn't also like to see it wiped from the face of the Earth.