One of the doctrines of Islam is to kill in the name of Islam.
Islam is the enemy and you need to open your eyes.
that, I will wager, constitutes a very sophomoric read of the doctrine.
It can be argued that Christianity teaches the killing of unbelievers, but no Christian with any sense would call it Christian doctrine.
I've heard the Koran quotes that are usually cited to support the radical view, btw.
But, you can't punish people for their religious beliefs. You can punish them for murder. And that's what the rule of law provides for.