So far the film Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan has ticked off the nation of Kazhakstan, a couple of Southern frat boys, and countless other unwilling victims that were lampooned in the movie. Now we can add Kid Rock to the list.

Though Pamela Anderson, 39, and Rock, 35, filed for divorce on November 27 (citing “irreconcilable difference”) after four months of marriage, tensions between the two had been brewing for awhile.

A source close to the actress tells Us that “the beginning of the end” came in late October at a private screening of Borat (in which Anderson stars as herself) at Universal Studios President/CEO Ron Meyer’s house.

According to a witness, Rock (né Robert Ritchie) grabbed Anderson and stormed out of the screening room after he saw the scene (spoiler alert!) where Borat finally watches Anderson’s infamous sex tape with former husband Tommy Lee and realizes that his dream girl isn’t a “virgin.”

“Kid stood outside screaming at Pam, calling her the worst words – slut, whore, you name it,” says the source. “It was horrible, and she was just so hurt by it.” A source close to Rock confirms the incident, saying, “Yes, he was angry. He thought it was cheap that she put something like that out there. He didn’t see the humor.”

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Um, I don’t want to state the obvious here – or anything – but it took Kid Rock seeing “Borat” to realize that he was married to, uh, Pamela freaking Anderson!! He thought THAT made her cheap!! Haha, that brought a little laughter to my afternoon.