Judith Regan apparently was not fired from Harper Collins for the tasteless O.J. Simpson nonconfession. Harper Collins is owned by News Corp., the same company that owns Fox News, so it's not surprising that the company did not fire Regan for the horrible idea paying O.J. Simpson to write a book about how he would have killed his ex-wife if he had really been the person to do it.
According to The New York Times, Regan, who is famous for her loud mouth, made supposed anti-Semitic comments to one of News Corp.'s lawyers. The newspaper said the comments were made during an argument between Regan and the lawyer, who happens to be Jewish. The lawyer called News Corp. owner Rupert Murdoch, who ordered Regan fired.
Apparently there are some kinds of publicity that even Murdoch is afraid of.