A man who was three years old when his father – an American intelligence operator – sent him a letter on a vanquished Adolf Hitler’s stationery has declared himself disgusted by US extremist groups who still admire the former Nazi ruler. “Those people have no idea – the history and foulness of that,” Dennis Helms, the son of the late Richard Helms, the CIA director from 1966 to 1973, said of the presence of neo-Nazis and antisemitism in the US. “There can be nothing that’s worse … I can’t say enough bad about that.” Helms’s remarks came in an interview...