Good read describing as things really were, but this part is not fully correct - communists got to the power legally by winning the elections, in 1946 in Czech part of Czechoslovakia and in 1948 in Slovakia.
People were naive, uninformed and generally saw soviets mainly as liberators from nazi occupation (which was true). Few knew what stalinism brings, without exceptions and those few either were quiet or didn't matter enough.
As soon as they got full power, democracy was effectively disbanded, political opponents either executed or jailed, and things like 'famous' uranium mines in Jachymov started operating like execution camps for undesired (something like soviet siberian gulags with added benefit of handling radioactive material without any protection). Ironically all this uranium was given to Soviet union for free AFAIK, and it was worth billions even back then (I guess some sort of ransom for very active 'protection' from evil capitalism).