The famous physicist managed a Manhattan Project teeming with Soviet spies.J. Robert Oppenheimer, “the father of the atomic bomb,” has long been a darling of the left, and not because he oversaw the creation of the most devastating weapon ever used. No, for them Oppenheimer is the tortured conscience of the Cold War and the martyred saint of McCarthyism. Kai Bird, co-author of the excellent biography on which Christopher Nolan’s film “Oppenheimer” is based, has penned a column in The New York Times lamenting the tragic life of the physicist, who lost security clearance in 1953. Oppenheimer was, writes Bird,...