Recipe for disaster: Take a psychotic individual who combines delusions of grandeur and at least some measure of charisma. Add even one other person who is at best unstable enough to be very vulnerable and suggestible. Hope against hope that no one dies a horrible death.
Now we'll have some people here pretty much implying that this is what is to be expected of anyone in the world with religious faith. I don't know that there is any way to even try to reason with that level of bitter hatred.
At the same time, I don't know that you can say that a belief isn't religion because it's been hopelessly twisted by a demented individual or group of demented individuals who have gravitated together.
So go ahead; fight it out. The people involved in this incident are totally incompetent, whether from lack of intelligence or lack of sanity. They're also totally culpable for the horrific death of a little child. I have no idea how to sort out the legal definitions.
We've just lost a good friend to murder-suicide; he was the perpetrator; it had nothing to do with religious belief, and he had never been suspected of anything more threatening than a degree of emotional immaturity. I have no stomach right now for the kind of exchange I anticipate here.