Some of the worst atrocities in history have been commited because 'god said so.'
In the movie 'Se7en' the killer murders people that have commited any of the seven deadly sins.
I think we should look at people that bring 'warnings from god' or that deliver 'messages from allah' or 'the will of quetzalquatl' with some scepticism. If you don't believe in any god, then anyone who claims to have a message from god should better be avoided. How would you react if someone told you they had come to act out the will of Santaclaus?