Well, I suppose you could compare the Amirault trial to the "Red Scares" except that, you know, the Communists were actually guilty.
The Constitution is very clear on what a traitor is. No communist was a traitor, not the Rosenbergs -- even though Julius passed secrets to the Russians. Why? Because the Russians, the Soviets, were our *allies* not our enemies.
We never did get to officially declaring them an enemy, now, did we? And in World War II they were our ally.
The Red Scares were indeed a witch hunt. As *American* as John Adams' Alien and Sedition Acts.