Are you saying he practices Christianity but doesn't actually believe in Christianity?
...he's a little too clever to be a believing Christian.
Why are people surprised by this?
Less than 5% of PhD level physicists believe in ANY kind of higher power... among PhD level molecular biologists that number is under 1%. Among the physicists, even those who believe in some sort of higher intelligence don't believe in a personal god... more of a set of sublime mathematical relations governing the interaction of matter and energy.
Obama was a Harvard Law Professor.
I've met quite a few super-IQ types (I studied physics)... not one of them was religious in any way.
Mention religion or a sincere belief in a personal god in a room full of career scientists and you'll get the same reaction any employee could expect recommending Santa as a company delivery service.
The upper limit for religious belief (in my experience) is an IQ of about 110. Some religious types apparently defy this convention... but it's important to differentiate between genuine IQ and disproportionately developed skill sets.
The Luke