Atheists, tell me, a Roman Catholic: why should I become an atheist?

[Mr Greene]

Thank you for your responses everyone. I plan on reading through and thinking more about things about why exactly I believe in God more tomorrow, and responding more as well. As for now, in short, I suppose it was because I was raised Catholic, looked into the teachings without questioning them too much, and following the teachings seemed right. It just made sense to me.

The thing is, questioning my faith seriously for the first time obviously forces me to think against what I've considered fact for a while. This is the first time I've genuinely thought, "What if there's no God?" I know, from the mindsets most of you are used to, God existing is just made up and doesn't make sense. It's hard for me to let go of what I and so many others considered fact. Obviously I need to look into this more.

OK whilst I was never a Catholic, I was sent to a Catholic school from 3-9yrs.
I became an atheist during this period, specifically just after First Communion (when I was around 7yrs old IIRC).
It began as spotting that what I was being told wasn't truthful, from there I tried to verify what I was being told and repeatedly ran into a brick wall.
Ultimately it comes down to the question; 
"Did the Jews tell the truth?"
It took me until I was in the final year of University to definitively answer that.
Jews did not exist before around 450 BCE.
There never was an Exodus from Egypt. There never was a monotheistic kingdom of Solomon.
The Jews lied.
Specifically the scribe Ezra, we aren't merely talking about a lack of evidence to back up the story in the bible, the archaeology actually directly contradicts the bible, prior to the book of Ezra.
Youtube link