Maybe I haven't looked into the case deep enough or have a good enough understanding.
But from what I can gather he never actually killed anyone. And yes he might have brainwashed his followers who did murder those 7 people but surely they are accountable for their own actions?
I'm not saying he's a good person who doesn't deserve to be there, I'm just confused as to what he was charged with to be in prison for the rest of his life.