Atheist believe there is no God, they just take an opposite approach. To take a different approach, how can you prove to a shitcoiner that bitcoin will prevail at the end and prove them wrong? You can't, you assert its better and they assert ethereum or cardano is better, but you can't prove it. That's why we debate and use facts to prove our positions. 
Atheist assert their is no God, believers assert there is, how can you have a position on something without an explanation of your position. Atheist don't know as a fact that there is no God, they can't prove it, so it is a belief that they are right, but can't prove it. But, the evidence that there is, far out weighs the otherwise. Start by showing me where in the world something created itself.
I don't know what world you live in, but most of the time, many are made to prove innocence, while an accusation alone gets them arrested or detained.
But your example isn't that valid anyway, atheists are rebels against the idea of God because they can't see it, but accept many other ideas they can see such as scientific theories.