Yes. He was a registered communist, and also anti-war for his entire life. However, you fail to mention that he signed up for military service during WW11 and soon renounced his former association with the communists. He accepted his mistake and paid for it dearly with dire consequences to his career and blacklisting for a long period, although he was clearly never a threat in any way.
One foolish mistake does not in any way negate a lifetime of service and positive work for good causes.
