If he's not part of the solution, he's part of the problem. And he's not just saying he "isn't a rapist", he's discounting women's experiences. I've never had a man come into my comments and simply say, "I am not a rapist". He says something defensive meant to shout down women as they're trying to talk about a societal problem. You guys that take it so personally just make it sound like you are most definitely part of the problem.
As Kate H so beautifully illustrated in her article that I've posted below, rape is a men's issue.
https://medium.com/fourth-wave/rape-is-a-mens-issue-b0050183cd25