I have never negatively judged people who have done a wrong. Whether their crime is severe or whether it's bad. I always look at them and understand that they are human.
You should never look at a criminal with hatred ever. All things are forgiveable in my book, even murder. The only time I judge is when they are old enough to understand better and their proud of the crime they've committed.
Now if the person is young or demented or suffers from a disease that makes them act the way they act. I actually have sympathy for them. People are never perfect and I have the most sympathy for people who have no self control. We all have bad impulses and urges. Admit it. The ability to not control behaviour against your own will must be a living hell.
So show sympathy. Some of these people have neurological issues and self control issues beyond their control. Who are you to judge, with your perfect life.