I don't believe in any God,but I don't see why this would get anyone's panties all in a wad. It has no effect whatsoever on anything. The money is has the same amount of purchasing power it would have if that slogan weren't on it,so what's the big deal other than wanting the power to dictate to others what they CAN'T believe in?
And HOW is this any different from telling others what they MUST believe in? Or NOT believe in,as the case may be?