I know he was distrusted for his political inclinations, and the final straw was his fervent anti MAD stance, but had he been found acting as a spy he would have been immediately prosecuted on all fairness, there was no reason at all for letting him live, with all of the knowledge (and internal knowledge) he already had, if he was suspected of being a spy. It would have been extremely dangerous.

didiplaywell

Oppenheimer lost his security clearance.  Teller spoke against him.


Bell_curve

science

Which scientist occupies prime space in your mind?

cryotosensei

I seriously doubt it, such an emotionally unstable person can't be trusted for such an intense task, which is also a permanent state: he couldn't stand a joke, I don't think he could stand the 24/7 death threat of being a traitor to the most powerful nation of the world on THE most delicate possible matter ever. On top of that, he never suffered any grim consequences other than ostracism when he tried to counter the MAD doctrine. Had the services had the slightest suspicion on a true involvement of his on such activities he would have faced the same fate Turing did.