Insanity defense

[fredtoast]

If someone chops off his child's head and claims it was because God told him to should he be able to use a defense based on diminished capacity ( insanity).

I say "no" because all religious beliefs have no basis in reality or logic.  Therefore the argument would be that everyone who believes in God is insane.  And almost all religions have dogma that justifies killing in the name of their beliefs.