I'm really sorry about your assault and your conflicting feelings surrounding this. I also have those types of feelings towards sex and violence due to traumatic events from before. I know that it is a trauma response, especially if the abuse happened during childhood, because your brain begins to confuse abuse with comfort, with attention, and you want more of those things. It also plays with your self image and self worth. I believe I deserve to be abused, so I desire it.
I used to believe I was insane because one of my fantasies was being r*ped. I talked about it with a therapist after lots and lots of coaxing and only over texts so we wouldn't have to see each other, and then was told that I was 1. Not crazy or gross and 2. What it was is that I believed the only way someone could want me was by force.
I still get these thoughts and more, but now I don't berate myself like I did before. I acknowledge them, try to understand what's inside them, and then comfort myself.
I don't know if this will help, if it's similar to your issue, but I want you to know you're always welcome to talk about it and that you're not alone in this. Thank you for sharing your feelings and I hope you find peace someday.