Why Do So Many People Think Obama Is A Muslim?

Obama bows to the Saudi King who is also a religious figure in Saudi as he is the Custodian of the Two Holy Mosques
Quick Update 4/20/13: Here are two more recent and pretty convincing articles to persuade even the most unpersuasive among us over to the point of view that Obama is entrenched with the Muslims, and is himself a Muslim.
Obama's Ties to the Muslim Brotherhood 
BOMBSHELL REPORT: OBAMA'S RING, 'THERE IS NO GOD BUT ALLAH'

AtlasShrugs


By their fruits ye shall know them, and so we know him. Stop beating people up for being logical. Robert Spencer explains, referencing a 2010 article of mine to fisk a spectacularly clueless Slate article:
The Leftist media just can't figure out why people would think Barack Hussein Obama is a Muslim. They think, as this witless article in Slate shows, that it must be because of his name, or his race. It never occurs to them, or they deliberately wish to obfuscate the fact, that Obama has repeatedly reinforced this impression throughout his presidency. Whether he is a Muslim or not, he has acted favorably toward Islam and Islamic supremacism from the day he took office. Pamela Geller included a lengthy but still partial list of the many ways he has done so in an article she wrote in June 2010:
And that's just up to June 2010. It isn't as if he has changed course since then. And while he did approve of the killings of bin Laden and al-Awlaki, he has never done anything or said anything negative about the non-violent advance of Sharia in the Islamic world or in the West, including the U.S.
"The Muslim Rumor That Just Won't Die," by Matt Taylor for Slate, June 22 (thanks to Kenneth):
Ever since he began running for president in 2007, Barack Obama has been dogged by rumors that he's secretly a Muslim. Whether it's his exotic name and background, the color of his skin, or (most likely) some combination of the two, the Muslim lie just doesn't seem to go away.
Each time it has begun to fade from public discussion, the Muslim rumor has cropped up again, like it did last year when real estate tycoon Donald Trump, who was publicly weighing a presidential bid at the time, insisted he had evidence showing Obama wasn't born in the United States (and that his birth certificate might show that he's Muslim).
In response, the president eventually took the extraordinary step of releasing his long form birth ceritificate [sic], which showed he was born in Hawaii as claimed. But a new Gallup poll finds that even now, a healthy chunk of Americans believe the rumor:
Just 34% of Americans correctly say U.S. President Barack Obama is a Christian, while 44% say they don't know Obama's religion and 11% say he is a Muslim.
Obama is a Christian and has labeled himself as such as in his writings and interviews, and while living in Chicago he attended the Trinity United Church of Christ. Since moving into the White House, Obama has attended several different Christian churches....
PRINCETON, NJ -- Just 34% of Americans correctly say U.S. President Barack Obama is a Christian, while 44% say they don't know Obama's religion and 11% say he is a Muslim.
Do you happen to know the religious faith of Barack Obama? (If "yes"): Can you tell me what Barack Obama’s religious faith is? June 2012 results
Obama is a Christian and has labeled himself as such as in his writings and interviews, and while living in Chicago he attended the Trinity United Church of Christ. Since moving into the White House, Obama has attended several different Christian churches.
Americans are indeed more likely to say Obama is a Christian -- mostly a generic "Christian" or "Protestant" -- than to say he identifies with any other religion. In addition to those who name a specific religion or don't offer a guess, 8% say he does not have a religious affiliation.
Americans are more likely to know Mitt Romney's religion than Obama's religion, with most Americans correctly saying Romney is a Mormon and a smaller 33% saying they don't know.
Eighteen Percent of Republicans Say Obama Is a Muslim
Democrats are more likely than Republicans to be able to name a religious faith for Obama, and are more likely to say Obama is a Christian. Just 3% of Democrats say Obama is a Muslim.
Republicans are less likely than Democrats to say what Obama's faith is and are more likely to say Obama is a Muslim. It is unclear whether the 18% of Republicans who say Obama is a Muslim do so because they truly believe this is his religion, or because it is a politically charged idea.