There is no need for the element of faith in the instance of atheism, because fundamentally it bases understanding and 'belief' upon proof, measurable and testable hypotheses and results one can see, touch, and measure. I was taught in elementary school that 2 + 2 = 4. Do I need to have faith in order to believe that to be true? No, because it is a fact.
I do not need to have faith that God doesn't exist because no rational evidence exists that convinces any reasonably-minded person of any alternative. If there were a radical mathematical sect out there that 'blasphemously' taught schoolchildren that 2 + 2 = 5, despite all evidence that it equals 4, then yes, that would be a viewpoint that would require a great deal of faith to support and embrace. This is the equivelant of religion in the modern era of human development - a point of view contradicted by all rational authority that still maintains its insistence on the literal truth of its teachings.
Benjamin Franklin, an early American statesman, thinker and non-Christian, once rightly pointed out that to "see with the eye of faith, one must close the eye of reason," or words to that effect. A viewpoint contradicted by science, facts, logic and reason is the only viewpoint that requires 'faith' to believe in. Atheism is
supported, rather than weakened, by appeals to rationality - it requires no 'faith' to embrace, only a brain capable of knowing that 2 + 2 = 4
As for the Big Bang, the underlying physical principles behind it render it entirely possible. Plausible or a particularly 'strong' theory by scientific standards? Certainly not, but as Sherlock Holmes pointed out, "once you remove the impossible, that which remains, no matter how improbable, must be the truth." While the quote does not translate precisely into this discussion, you can take "once you remove the the impossible" to mean "once you remove all points of view not in any way based upon rational thought (read as: Scripture)", and "must be the truth" to mean "must be the truth we accept for the time being until a better one is uncovered". A sloppy transciption, but effective in this scenario nonetheless.
I do so enjoy arguing with religious folk. Their arguments are usually so easy to tear down that it is like shooting fish in a barrel. Have your beliefs, people, but please, follow three simple rules.
1) Keep them to yourself.
2) Keep them out of civilized adult discussion in the twenty-first century.
3) If you must talk about them, try to at least SOUND intelligent and convincing.
I am a student at the University of Minnesota double-majoring in sociology and theology. You will have to do better than this
.