Contempt of god

One word substitute is Blasphemy.

Atheism: disbelief or lack of belief in the existence of God or gods.
Nihilism: the rejection of all religious and moral principles, in the belief that life is meaningless.
Blasphemy: the action or offence of speaking sacrilegiously about God or sacred things; profane talk.
Agnosticism: the view that the existence of God, of the divine or the supernatural is unknown or unknowable.