Would Murdoch really fire Glenn Beck?

There is a great opinion piece in the Huffington Post on how Rupert Murdoch could fire Glenn Beck. The writer, Ben Cohen, suggests that Murdoch doesn't necessarily care about politics, using examples of how he has backed different political parties based on their popularity in the past, he cares about money. With advertisers ditching Fox after Beck's allegations that Barack Obama is racist, Murdoch needs to weigh up if Beck brings enough viewers to counter the loss of advertising. My thoughts are that Murdoch will see that yes he does. In the unlikely event Beck were fired, I'm left wondering what is worse? Supporting an opinionated, and generally uninformed "journalist," or selecting content and opinion to keep advertisers happy?