Law Suit Over Distorting History

The whole idea brings up so many bad jokes but how could bringing this to court make sense in any context?

How many movies based on history are even remotely accurate? I haven't seen The Passion of the Christ but it can't be more distorted than the history of Mel's other movies like Braveheart and The Patriot (even Gallipoli has its mistakes).

On a worst case scenario, wouldn't this open the doors for a Holocaust-denier to sue Stephen Spielberg?