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Whoopi Goldberg and Joy Behar walked off the set of The View after guest Bill O'Reilly made a comment linking Muslims and the 9/11 terrorist attacks.

O'Reilly appeared on Thursday's show to promote his new book, Pinheads and Patriots. During a discussion of President Obama, the Fox News personality questioned Obama's statement that he wouldn't comment on the construction of a Muslim community center near Ground Zero in New York. "Seventy percent of Americans don't want that mosque down there," he said.

Watch clips from The View

When the hosts asked O'Reilly why people would object to the community center, he replied, "Muslims killed us on 9/11." Behar responded, "I don't want to sit here with you" and walked off stage. Goldberg joined her with cheers from the audience.

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Barbara Walters didn't condone her co-hosts' behavior. "I love my colleagues, but that should not have happened," she said. Behar and Goldberg returned after O'Reilly apologized.

Watch the clip of the argument below.