Well, like you said, you refuse to believe that rapist suffer.

I also "refuse" to believe that the Earth is flat -- or to put it more accurately, I assert that it is false.

That is fair. But if that is fair, then Bob might refuse to believe that people with specks in their eyes suffer as well...

The difference is that Bob would be wrong.

Not me, not you but why am I not allowed to use that as an example?

Making random shit up and saying "what if this?", "what if that?" doesn't make for a useful discussion.

Then again, I am not a utilitarian, so I have no problem with saying that the more someone wants to do an evil thing, the more they should be prevented from doing it.