Was it ever actually ILLEGAL to be a Communist? If not, why not? If so, when did it not become illegal?
I don’t think he was actually a communist. He was a globalist, part of the Anglo-American Establishment Carroll Quigley (Bill Clinton’s mentor and professor at Georgetown) talked about in Tragedy and Hope.
Their goal is to overthrow the United States from within, slowly. So yes, that is a conspiracy of sedition.
Although the Alien Registration Act (aka the Smith Act) of 1940, the Internal Security Act of 1950 and the Communist Control Act of 1954 placed restrictions on the Communist Party, it was never outlawed.