Is nihilism the logical extreme of atheism?

[fr0d0]

The major difference between the atheist structure and the Christian structure is that atheists are compelled to form their structure from reason and Christian use The Bible and/or revelation in addition to (we hope) reason.

What I don't see is how having a moral system created by god would provide humans with more purpose in life.

I think our position (Christians and other theists) is reasoned where atheisms is sensed. The bible, for example, is evidence of the reasoning process. Atheists can reason and do, although their reasoning is limited to a non perfect reality as it's base. Intrinsically inferior. So of course, a moral system encompassing justice trumps a moral system based upon injustice.