Burning and drowning is barbaric. We shouldn't have to regress into such tribal actions.
Not to mention, death by either of the two methods are extremely painful. More painful than a hammer to the head and rape. If I were to be lit on fire or forced to drown, I'd gladly ask for hammer and rape instead. Heck, given the choice I would take a quick death over burning and drowning.
Terrible way to die, he definitely deserved it. He suffered a few short moments and his victim gets to suffer for the rest of her life. This really is a crime that shouldn't be shrugged off with "Give him about 8 months in prison."
His "few short moments" I believe is far greater agony than whatever the victim will suffer for the rest of her life. Don't underestimate physical pain. Especially one caused by an angry mob.
Some people just aren't as strong and take psychological trauma, and while no one will just "get over it", most people are strong enough to live on without serious difficulty even after rape. They'll be in shocked, emotionally stressed, they'll go to therapy, and in a few years life will return to the way it was.
Did he deserve a long ass sentence in prison? Probably. Did he deserve death? I don't believe in the death penalty but I can understand your feelings if you say yes. But did he deserve the kind of death he got?
I can only say yes if that hammer to the head resulted in brain damage and the poor girl becomes handicapped for life. If this was the case, the man can go ahead and be lynched to death by an angry mob and that'll repent for actually ruining a person's life forever.
But my primary concern here is the fact that an angry mob can form like that. Technically speaking, they all should've been arrested and charged with an off degree of murder.