Conversation during the morning show segment had turned to the so-called "Ground Zero Mosque."
"Seventy percent of Americans don't want that mosque down there," O'Reilly said.
When asked why, O’Reilly explained that the mosque was not supported by the majority of Americans because its location was “inappropriate."
When Goldberg asked why it was inappropriate, citing 70 Muslims who died in the attacks, O'Reilly said: "Because Muslims killed us on 9/11. That's why.”
Goldberg responded, “That is such bulls**t."
"Muslims didn't kill us? Is that what you're saying?" O'Reilly asked.
"Extremists did that!” Goldberg said.
As the conversation became more heated, Behar got up from her seat beside O'Reilly.
"I don’t want to sit here right now, I don’t," Behar said. "I am outraged by that statement.”
Goldberg joined her colleague and the two walked off stage.
Barbra Walters came to their guest's defense.
“I want to say something to all of you. You have just seen what should not happen,” she said. “We should be able to have discussions without washing our hands and screaming and walking off stage. I love my colleagues, but that should not have happened.”
Walters then said to O’Reilly: “Now let me just say in a calmer voice, it was extremists. You cannot take a whole religion and demean them.”
“If anybody felt that I was demeaning all Muslims, then I apologize,” O’Reilly said.
Goldberg and Behar returned to the stage minutes later.
“We’re back because now you apologized,” said Behar.