This shouldn’t surprise anyone since he refused to put his hand over his heart for the National Anthem, and refused to wear a U.S. flag pin while running for President in 2008. He probably can’t even recite the Pledge of Allegiance with reading it from a teleprompter.
Brett Stephens has an excellent article in the WSJ on Obama’s refusal to speak at the sesquicentennial of the Gettysburg address.
If the article is locked, send me a FreepMail and I will post the salient segments.
Why would he? It's something you learn as a child in America. Zero didn't set foot on the US mainland until the age of majority. What he remembers from his childhood is the call of the muezzin - the "most beautiful sound in the world."