For what it's worth, here are my thoughts on the bow:
Obama did not greet any other dignitary in a similar manner. He greeted Queen Elizabeth, for example, with a handshake and a nod of the head. Thus, it seems obvious that he did not greet King Abdullah as he did because he thought it was proper protocol for greeting royalty.
I have to ask myself what is special about the King of Saudi Arabia that would cause Obama to bow to him in this manner. I do not believe, for example, that this greeting has anything to do with America's dependence on Saudi oil. So, what else could it be?
The very first impression that I got when I saw the video was that Obama was kissing the King's hand. The scene immediately reminded me of that of a Catholic kissing the Pope's ring.
"Custodian of the Two Mosques" (or "of the Two Holy Shrines") is a pious title previously claimed by various caliphs, and now held by the King of Saudi Arabia. The King of Saudi Arabia is considered the protector of the two holiest cities in Islam: Medina and Mecca. It has traditionally been the custom to kiss the hand of the Custodian of the Two Holy Shrines.* Could this be what Obama was doing?
If so, why? One answer, obviously, would be that Obama is a Muslim. Mohammed was known to have given approval for Muslims to feign conversion when it is expedient to do so, as long as their hearts remained true to Islam.
However, there are other explanations, too. Perhaps, like the Episcopal priest,
the Rev. Ann Holmes , who recently proclaimed, "I am both Muslim and Christian," Obama feels it is possible to follow both religions simultaneously. Or, perhaps even though his conversion to Christianity was genuine, the bow was a reflex reaction, a case of "old habits die hard." Maybe he was just showing his respect for Islam.
Whatever his current relationship to Islam, it is my belief that Obama was not bowing to the King as Head of State, but rather as Custodian of the Two Holy Shrines. The motive was religious more than political (IMHO).
*I thought Pam's comment about hoping her president knows more than she was amusing, in light of the fact that Obama was apparently unaware that King Abdullah made a decree back in 2005 eliminating the custom, as he declared that bowing before a king was an unseemly act of idolotry.