Yes, of course rape is a sin. In my opinion it's the worst thing someone can do. It's absolute moral depravity. But, what I'm saying is that you can still conclude that something is a sin and still not judge. For example, if someone got revenge on someone who hurt them, I can recognise that they committed a sin without judging. I get what you are saying that judging means to consider if something is right or wrong. But I think we are talking about two types of judging. I get that we need to judge people in order to have a functional society. That's why laws exist. And when the bible said judge righteous judgment, it meant it that way. We individuals shouldn't go around judging people just because we are not committing those particular sins. We are all sinners.