It was supposed that an atheist requires faith to be an atheist. This is not true. It does not require faith to be an atheist.
There are suppositions that humans make as they move through life. Chief among these are the suppositions:
1. the environment we interact with is real.
2. laws of reality do not change
3. the reality that we experience is the same reality that all other people experience
Once a person accepts these suppositions as fact and we all do (except perhaps The Man in the Shack), then there is one more supposition that most people believe. They may argue that they do not believe this, but they do.
4. a thing must be proven true rather than proven false
Almost none of us believe in Might Jove sitting on Mount Olympus. This is because there is no proof for it. Almost none of us believe in unicorns, again, because there is no proof for it.
All the atheist does is acknowledge that there is no more proof available for the existence of Yahweh than for Jove. The atheist also acknowledges that there is no more proof available for a Great Spirit, Transcendental Being, Prime Mover, or The Force than there is for the existence of a Yahweh.
Because there is no proof, therefore the atheist does not believe. The atheist is not required have faith because the atheist is rational.