How many 'out' atheists are there in public office in the US? Last time I checked there weren't any whatsoever in Congress.
The notion of any separation of church and state in a country as devoutly religious and intolerant to non-belief as the US is absurd, I'm afraid.
Obama's rhetoric is just as religion-infused as Bush's was. I can't remember a speech by a US President that didn't end with 'God Bless America', or words to that effect, can you?
Like it or not (and I tend not to like it) religion is a way of life, not a lifestyle choice that can be packed away into the background, separated from public life. This is a liberal fantasy peculiar to the US. It certainly has little purchase in the Middle East and falls apart under inspection in the US case too.
Now, don't get me wrong, I'm as un-believingly secular as they come but I'm afraid the 'secular state' is a fantasy. There has never been such a thing, so why are we surprised that this is how politics is framed above and beyond the state level?
Framing the whole east-west 'clash' in religious terms also facilitates the illusion that these are simply two alienated sides of one united humanistic coin that must be mediated and reconciled. This trope of 'misunderstanding' deliberately ignores the sorts of issues that speeches can't so easily gloss over like massive socio-economic inequality and decades of imperial-style interference at every level of political life.