What is the definition of an atheist?
To believe there is no God requires faith. Without evidence that faith is akin to the blind faith many Christians have. If you said you were agnostic then you would be on firmer ground as far as evidence goes. But to say there is no God when you have no evidence of such suggests faith. Faith without proof.
If you take your position as default without any evidence then you are basically doing what Christians do when they say its obvious that God is real.
D'aaaawww, you completely ignored my post and didn't watch any of my nice youtube videos, did you? For shame!
If I told you I had a Magical Invisible Elephant in my closet who granted wishes, would it require faith for you to doubt its existence? Doubt is the opposite of faith, and doubt and skepticism are pretty much the only things all atheists have in common.
Now, there may be no solid evidence that your god doesn't exist (as there cannot be solid evidence that my invisible elephant doesn't exist) but there are many reasons to doubt it. There's the locality of the religion, for starters. Assuming a god did create everybody, it was awfully discriminatory of it to reveal its existence ONLY to a small group of people in the middle of a desert. We call the Middle East the cradle of civilization, but that is nonsense. China was already a well-established empire, the Celts were faffing about in Europe, and natives of the Philippines were crossing oceans in small canoes as they steered by the stars when your god 'revealed' itself to this small group of goat herders. Raw deal for the rest of the world, eh?
Now, you could say my elephant doesn't exist because I don't get my wishes granted. Not true! It's just that the elephant only grants the wishes it wants to. I wished for a hundred dollars, but the elephant had a plan and it didn't include a hundred dollars. But then I wished for strength to get through a hard time, and behold! I felt stronger and I got through. Ergo, elephant.
In other words, the only measurable effect of prayer is that it makes the prayer (and sometimes the prayee) feel a little better. Which is fine, whatever floats your boat, but it's not proof of a god or an elephant.
Now, you might get on to the logistics. How can an elephant fit in my closet? (How can a god that is said to be all good and all powerful let evil exist?) Well, I say, the elephant can be as big or as small as it wants to be. (God has 'a plan') If the elephant is there, why can't it be felt? (Why doesn't god seem to have any measurable effect on reality?) Well, I feel the elephant. If you don't feel the elephant, it must be because you don't want to. (I feel god's love, god did everything so of course you can't measure its effect.)
And then there's the bible, which a lot of believers hold as solid, certain fact in book form. Ah! Here's something quantifiable, falsifiable, testable! A flood covered the whole earth, they say. Well, we know that's not true, we've figured out the movement of the continents and Pangaea and frankly, there's not enough water on earth to cover all the continents (and again, where did all those people on other continents come from?) It's less than 6000 years old, some say. Well, you can look at what an old book says about geology, or you can look at what actual rocks say about geology, which is that it's much, much older than that. And then on top of all that there are the sheer number of contradictions in the bible. While we cannot definitively prove that something in the bible is untrue, a text that contradicts itself cannot be assumed to be true.
YouTube - Quiz Show (Bible Contradictions)
So, yeah. No solid proof, but PLENTY of reason to doubt and no reason to believe besides what other humans say.