Actually Naem, just living in hunter/gatherer societies is dangerous enough to need protection. The chief cause of death in pre-agricultural societies is murder.

The jujuman wasn't beaten because he was practicing his religion. He was beaten because he failed. He made a claim that wasn't met. These people were, in fact, being very scientific. Jujumen whose charms don't work are false jujumen, and posing as a jujuman when you aren't is a danger to the whole tribe, and thus a capital crime.

Alex