Subject: Re: Sharia
This is the central tenet that you take on faith.

No it isn't. As another poster said, any positive claim needs to be proven with evidence. Most atheists take the skeptical position. You prove your positive claim (there is a deity), and you're done. Some atheists will take the position "there is not a deity", but that's a positive claim that has to be supported. It's still an absence of religion, but it also in unsupportable. Any atheist who's thought about it will say "there probably isn't a deity", which is just an expression of skepticism. Give us proof and we'll change our minds (most of us).

No faith involved. Proof required. Thus far, no one has been able to prove it one way or the other. So skepticism is the rational position.