That's ridiculous. I am an atheist and I don't have faith that there is no god. I'm just pretty sure that monotheism is not an accurate conception of reality because it is one idea out of an infinite number.
Agnosticism exists among theists and atheists. Theists may have faith while aknowledging that there is no way to know absolutely. Atheists may conclude that monotheism is not real for all practical purposes, but know that there is obviously no way to prove this.
I'm pretty sure god doesn't exist just like I'm pretty sure there is not an eyeball floating right behind me. That is not faith.
I find it humorous when someone who relies on faith thinks other people do, too.