Of course Alger Hiss being a communist spy has been absolutely proven, but the moon-bat liberals won't learn.
That's because, as the Venona Papers were to show, some of them weren't "useful idiots" at all -- they were on the payroll instead.
CBS had one working the Middle East. I.F. "Izzy" Stone was another. There were plenty of high-toned traitors running around back then; the OGPU recruited guys like that especially, disaffected double-domers with a chip on their shoulders because the other boys gave them wedgies in the restroom.