I find it interesting that there are those who would believe that just because a president says: "May god bless you" they take that to mean that the president is religious or that those who are not religious can't/shouldn't support a president who is.<quoted text>
So you buy into any conspiracy nonsense as long as it gives you justification to hate someone.
Even if Obama is religious, he doesn't use his religious beliefs to govern.
I don't support- or not support- a president based on whatever his religious beliefs are and in Obama's case, there is not a lot out there about what he believes and how religious he is or not.
Regardless, using an expression such as "May god bless you" is not indicative of how religious someone is and even if that is an indicator that Obama is religious, I see no reason why that would make a difference to those who support him who do not believe in a god.
But I suspect that if a president came out and said he was an atheist, those on the religious right would find that enough reason to have no support for the president- regardless of how good a politician he might be and regardless of how good a President he might be.