Because the law is misguided, hurts farms, pointless, infringes our rights as Americans, and I personally love eating foie gras. Animal rights groups should focus on real issues that matter instead of trying for an easy win in banning something that the general public and government officials are not well informed on. It's sending the message of that it's easier to get rid of an arcane foreign tradition than to contemporize it.  They did it in Chicago we can do it in California.  But don't just take my word on the subject.  Many a respected Chef make their views known here: http://eater.com/archives/2012/04/19/foie-gras-piece-tk-tk.php