Rob, as an atheist I can't say there is no god. But I can examine the credibility of religion, and christianity falls quite flat in this area, and makes me question why anyone would believe. Your religious handbook from which all belief in jesus and the christian god stems from, says some things that just aren't true. Things we know now to be untrue, but probably seemed very plausible 2,000-3,000+ years ago.
The bible quite literally says you can move a mountain with prayer if you're faithful. Do you have faith Rob? Can you move a mountain through prayer?
Can I get a yes/no to prayer working as described in bible verse Matthew 17:20, please? Can you do what the bible says you can do through faith and prayer? Assuming you can't, how is this not evidence that prayer doesn't work?
The bible says there was a global flood that covered everything. Yet there is no such evidence for this (I'm also a little confused why an all knowing, all powerful being killed everyone except Noah and his family, and of course two of every animal in the world

, to cleanse the world of wickedness with the flood, only to have to send his son to be a blood sacrifice to himself some years later).
The bible claims the Earth is the center of the universe. We know this is not remotely close to true. And the sun doesn't orbit our planet either.
For centuries the bible helped push the myth that the world was flat (almost like it was written and made up by people who really had no idea about reality and had no divine intervention at all...)
There are many contradictions in the bible that call into question the accuracy of the stories told.
There is plenty more, but here are a few things that to me discredit the bible. Why should I believe it's wild and miraculous stories? Because it is socially acceptable in this corner of the world? Like I said, I'm still reading a lot about other religions, but so far they all seem equally man made and equally false.
If there is no physical evidence, but a suspect in a crime tells all kinds of stories that are shown to be completely false and contradicts himself, that can be brought up in court as evidence if that person is prosecuted. That's how logic works. In this case christianity makes all kinds of claims that are completely false and contradicts itself.
To me this is evidence that at least the christian faith is indeed man made and untrue. If an all powerful creator was responsible for its contents, I would expect him to at least get the basics right.