That is a very glib response to the 100s of millions that perished under the "Communist regimes".
As for the NFL, why on Earth would a socialist support that bunch of murdering thieves?
At the reading of Ho Chi minh's will, Ho wrote "to the workers of Vietnam I leave...". That was it, his gift to them was dying. Are you forgetting the murders and repression that take place after the end of the Vietnam war? The racism against those of Chinese origin? The boat people?
You seriously bring up strikes when it was and still is illegal to strike in any "communist" country, past and present.
Anti-fascism and anti-imperialism will sow the seeds of their own destruction as neither movement attacks the root cause of what they are campaigning against! Capitalism breeds racism and what you term "Imperialism". Also, how you can be against Imperialism whilst supporting the Soviet satellite states in Eastern Europe is beyond my comprehension.
Theorem, if the UK was turned into a one-party state, a-la East Germany, would the members of the SPGB be in big trouble? Would they be sent to the red-education camps?