Bill O'Reilly, the Fox News star, is mounting an extraordinary televised assault on the chief executive of General Electric, calling him a "pinhead" and a "despicable human being" who bears responsibility for the deaths of American soldiers in Iraq. On the surface, O'Reilly's charges revolve around GE's history of doing business with Iran. But the attacks grow out of an increasingly bitter feud between O'Reilly and the company's high-profile subsidiary, NBC, one that has triggered back-channel discussions involving News Corp. owner Rupert Murdoch, Fox News Chairman Roger Ailes, NBC chief executive Jeff Zucker and General Electric's CEO, Jeffrey Immelt. Ailes...