"Defiance," a movie about the Bielski Partisans who organized 1,200 wayward Jews, during the darkest days of WWII, hid them in the woods of Byelorussia, and taught them to fight, has another battle on its hands. It has to beat back our own cynicism and ennui about Holocaust films in general. It does so in lightning feints, like a guerilla warrior. Which is not to say it's a great film; it isn't. But not so fast.