A Jew is defined by Orthodox Judaism as a person born to a jewish mother only(according to other jews it includes the family too), and since his mother was jewish he is considered a jewish even according to the most strict religious sects of judaism.
Sam Harris is therefore defined by jewish religious law as “Apiqoros” (the religious term for “Atheist” or basically anyone who holds a philosophical viewpoint which contradicts the jewish religion specifically). An “Apiqoros” is a name taken from the name of Epicurus who first raied the question of the problem of evil, and in our days many jews have in fact raised that question after the holocaust.
And according to Maimonides an “Apiqoros” must be killed. and why orthodox rabbi’s arn’t ordering to kill all jewish atheists? (except for neturei karta and other very extreme fundamentalists)
the answer is quite obvious, they can’t, because reality will smite them.