No, you have it quite wrong. Educate yourself. It is NOT a tenet of atheism that god does not exist. Some atheists may say god does not exist, but that is just some. You continue to ignore my statement that I do not need to believe that god does not exist (in order to be an atheist).I expect it is too embarrassing for you.
Even wiki is a decent place to start, its first paragraph sums it up nicely, where you will see that atheists generally do not say that god doesn’t exist and other atheistic positions are described as ‘narrow.’