At first I thought Biden meant if there was an attack, obama wouldn't respond. But then I thought about it later. Biden was addressing THEIR supporters, some of them ACORN and ANSWER types. I think Biden meant Obama would respond in a way the ANSWER and ACORN people wouldn't like.
If there's an attack, IMHO, Obama will respond. Weapons and military force is always okay when the left is in charge.
I disagree that he would respond with force. He would rather try and negotiate with the mideast. He’s an appeaser, I fully believe he wants to divide society into his version of elites, government rulers and the rest of us. He’s a classic communist with no concern about the safety of the masses.