Activists Protest McNabb's Poor Performance; Say He Lends Credence To Limbaugh by Josh RighterMany Philadelphia Eagles fans are disappointed after quarterback Donovan McNabb's relatively poor performance in today's game against the New York Giants; his low quarterback rating for the game and several misfired and/or sloppy passes are to blame, they say.But there are also those who are disappointed for different, more political reasons."Donovan McNabb had no right to perform badly in today's game," said Richard Sleaner, member of the People Against Racist Remarks organization (PARR), at a press conference held shortly after the game. "His playing validates the disgusting...