The notion of God was created on basis of search of an ultimate Authoritative figure, thus justifying unjustifiable social hierarchies and giving birth to a sacred, unquestionable bloodlines.
Monotheistic religions are directly responsible for most of the human suffering through ages. The bible itself is a strict invitation to accept a suffering as a prime basis for a fucking human condition.
The human condition is just that - human-fucking-condition. It should not depend on any mercy of master, that's called slavery - and a concept of god just abolishes an individual responsibility of direct exploitation, transferring the ownership of the soul to some imaginary authoritarian third party.
Not cool in my opinion.
RE: A Quick Ontological Argument for Why God Does Not Exist