Obama uses faith frontally in politics; whether he acknowledges those without religion or not is not necessarily an afterthought, and I believe him on this. The problem is the concept of a religious endorsement to policy as something that, if not necessary, is even appropriate.
Even if Obama includes non-religious people in his all-encompassing description of us as a people or not, it's still being done in the context that is tantamount to saying that religion is indispensable and belongs in the arena of politics. There's nothing ethical that can't be presented without the slavish acquiescence to a big whoseywhatzit; the appeal can and should be made to right and wrong and such agreements upon what is right and wrong should be expressed in terms of the observable, mortal and "real". If any other approach is taken, those with the official or endorsed spiritual worldview trump the rest of us vermin.
Edwards takes things deliberately out of the realm of religious justification or anything of the sort, and quite coincidentally has policies that benefit the weakest among us the most of the three major candidates.
He's the one who repeatedly and pointedly uses Jefferson's term "separation of church and state" in speeches and interviews, and he does it with the zeal of someone who deeply believes in secular equality. He even used this term in an interview with Beliefnet.
Personally, I think you need to revise YOUR thinking; Obama's acknowledgment of the non-religious may not be merely a sop to forestall criticism, but IT'S STILL BEING DONE IN THE CONTEXT THAT PRESUMES RELIGION BELONGS IN POLITICAL JUSTIFICATION. Religion is here to stay, and acknowledging something that's so central to so many people's lives is not a bad thing, but it's a dangerous path, and he's bringing it up more than many of us think he should. At least he has the balls to do so, unlike Hillary, who plays both sides of the streets and seems to be a closet theocrat to boot.
Please read this little snippet; it's something that strikes to the heart of the issue. It's from a person's encounter with Edwards in an open forum. Follow the link for more.
I had submitted a question to the Presidential Leadership Forum, but it was not asked during the Forum, so I decided to ask John Edwards the question and I was a bit surprised when he pointed to me and I had the opportunity to ask the question. My question was this, "I am part of the 15% of the U.S. population that is atheist or non-believer. Most of the candidates use religious language that turns off this large percentage of the population. How do you plan on addressing the concerns of the non-believers?" John Edwards gave a really good answer. He first asked if I had any problems with using the word "moral" and I said that I didn't. He explained that he tries to use the language of morality rather than of faith because he feels that it is the responsibility of the President to represent the views of all Americans whether they believe in a Christian God, some other form of God, or no God at all. He then asked me again if I was comfortable with his using the language of morality and I said "I have no problem with that.
http://www.dailykos.com/storyonly/2007/8/6/13936/85325