Keith Olbermann's hating on Bill O'Reilly has become something of a cottage industry for the MSNBC anchor. His latest anti-O'Reilly-ism: making a Nazi salute gesture in reference to the Fox News host during his presentation in front of the Television Critics Association on Saturday.

Via Broadcasting & Cable:

MSNBC's Keith Olbermann used a Saturday morning breakfast session at the Television Critics Association press tour to fire yet another shot at Fox News Channel's Bill O'Reilly, holding up an O'Reilly mask while raising his right arm in a Nazi salute to mock his on-air rival.

"It's just so much fun," said the host of Countdown with Keith Olbermann when questioned about why he pursues his on-air rivalry with O'Reilly.

Olbermann Mocks O'Reilly [B&C]