Did communism threaten America's internal security after World War II?

After World War II, the question if Communism was threatening America was tossed in the air. I don't think that it was harming our internal security but it was definitely an issue. Outside of the US, places like China were dealing with Communism taking over their country and we tried to stop it so it wouldn't affect us internally. As Fried called it, we were having a "nightmare in red." We had our first and fifth amendments suspended while we were investigated for Communists everywhere. Including places like Hollywood, labor unions, school and public libraries. To help look for this we had HUAC and Taft-Harley Act to help keep Communist out of the US. So it wasn't that it Communism didn't play a threat at all to America, just not to it's internal security, we had that under control. So we had to help other countries to keep us safe by using the Truman Doctrine and Marshall plan. Haynes and Kiehr argued that codes were used to send messages to the Soviet Union but that still didn't really in my opinion affect our internal security. Overall, I don't think that our internal security was threatened, we just needed to check things out to make sure we were safe from a Communist takeover and then continue to do things to keep us safe, but we were never really "threatened."

I would define threatened as at a risk or being in a situation where it is more likely for something to go bad then good so we weren't in a threatened position.