If you're talking about "strong" atheism (asserting that no god exists) then yes, this is an act of faith as well.
But "weak" atheism is merely a rejection of theism. It is not a proposed hypothesis, but a rebuke of unsupported hypotheses.
But "weak" atheism is merely a rejection of theism. It is not a proposed hypothesis, but a rebuke of unsupported hypotheses.
All things that happen must have a cause.
Even Big Bang had its Cause. And since the exact definition of God is: "The only one not caused by anything, but simply 'cause' of Itself", there's no escape here...