What difference does it matter? The bible is used by christians because it is a symbol to them upon which they would never lie. A symbol that represents what they hold as unarguable truth.
So let's say for argument's sake Obama is a muslim. Swearing on the bible would mean nothing to him. Nothing more than swearing on the SEARS catalog. But swearing on the koran would represent a solemn oath to a muslim.
So if ,as you clowns keep thinking, O is a muslim, an oath on the koran would be a valid oath. Can you get your tin foil wrapped head around that concept?
I don't have enough time to get into how stupid you and your fellow anti-Americans are when you insist on carrying on this and other moronic internet rumors.
What do you care anyway swami