Is it relevant to this topic to explain why I think my lack of belief is correct? If not just ignore this post.
I am an atheist (I should say I'm an agnostic atheist, which means I don't believe, but I would not say that I am certain there is no God.), but I can only specifically explain why I don't believe in the Christian God, as I do not have much knowledge of the Gods of other religions. There are a potentially infinite number of Gods, so I can't possibly explain for each one why I do not believe in them. However, the burden of proof is on religion to prove that there is God, and one thing all religion has in common is that there is no evidence for their claims for Gods and miracles. A pretty major point against religion is that if it is true, it must be 100% true. As such, even the smallest contradictions show that religious claims are not infallible. For example, creationist claims are clearly incorrect, and this weakens the position of the Bible as a whole.