History gets changed by politics
People either don't know, don't care or simply forget that the truth about history changes over time.
One reviewer says that it was a lie that the civil rights movement was Communist backed and Communist supported; he was wrong. America has unquestionably changed for the better, but not by the civil rights movement; more by the actions of brave minority men and women on their own accords. So did the Feminist movement have enormous connections with the CPUSA. And a fair number of teachers are exposed every year in college to communism, even (especially) today.
The belief that communism and the Soviet Union just up and disappeared in 1991 is beyond ridiculous; it's like saying that tomorrow morning Americans would wake and decide to create a king and monarchy for themselves and get it done in a couple months, with the whole country just forgetting it's old belief system virtually overnight. Simply not possible.
There's an interesting book called "The Perestroika Deception". Google it, if you're curious and open-minded about political manipulation and strategy.
Finally, one last question:
Who did Rosa Parks work for when the bus incident took place?
Look around. Check several sources. Decide for yourself. The answer might shock you...