Belief in Satan is evidence you have a mental illness.
At least that’s a conclusion one could make from the very sad tale of the youth who stabbed his mother and father, and had planned to kill some classmates.
Mental illness is a huge problem in this country and one that is under-funded and under acknowledged. Not trying to make light of mental illness, but if someone is judged (quite rightly by the sounds of it in this case) to be suffering from a mental illness based at least in part because they acted irrationally in the name of Satanism. Then shouldn’t religious people be considered to have a mental illness if they act irrationally (like by blowing themselves and other up, or by killing a family planning doctor) in the name of God?