First off, the point here is that he's not an Arab, he's an American. He's not a Muslim, he's a Christian. Being Muslim - and i happen to have just discussed this issue with a immigrant from Iran who also happens to be a U.S. Army Veteran - isn't an issue of "bloodlines". It's a matter of choice. It's a matter of BELIEF.
The truth is that Muslims worship the same God that both Christians and Jews do. They rever the teachings of Abraham, Moses, Jesus - AND - Mohammad. It's a continuation not a competition. The thing here is that Barack isn't Muslim, yet even in his defense of that simple truth John McCain insinuates that Muslim's aren't "Decent, Family People".
There are criminals in the U.S. Some of them claim to be Christians. Some of them, in the name of Christ, have committed murders and have committed BOMBINGS. Particularly people like Eric Rudolph who bombed the 1996 Allanta Olympics, Gay Nightclubs and Abortion Clinics because "HIS GOD" told him too. Or people like Timothy McVeigh who bombed the Murrah Federal Building in Oklahoma City, becaue he wanted to start a Holy War with the "Zionist taking over our country". Christians can be criminals too, and they have NO RIGHT to point fingers at anyone else based purely on their "bloodline" (which is RACISM) or their religion.
And just for the record, Williams Ayers - who may have supported the idea of bombing the Pentagon to end the Vietnam War - was never convicted of anything. He's even received Chicago's "Citizen of the Year" award in 1998 for his work with schools and school choice, an issue in which he happens to largely *AGREE* with John McCain on. Even the prosecutor in the Weatherman case says linking Obama to things that happened when he was 8 years old, and Ayers himself has clearly risen far beyond and above, is ridiculous.
Judge people on what they do, not what they are.