Matt Hale is a violent Nazi known by many as a piece of scum. He's been in prison more than once for violence and serving 40 years in prison for trying to get federal judge Joan Lefkow murdered . He could spend the rest of his miserable life in prison.
He also founded a religion known as "Creativity". 
If he gets out at all he will likely be too old and weak to look after himself. Most Liberals don't often like locking anyone up for as long as that but when someone is utterly evil and likely to re-offend prison is the best place for that person.