Following are the status of current communist nations about Bitcoin
1. China: Banned except from Hong Kong, the free trade zone
2. Russia, the ex-communist: Banned but running the arguably biggest exchange BTC-e
3. North Korea: Kim Jong Un is yet to figure out what is Bitcoin. He is more interested in nuclear weapons to jump on the US force deployed at Japan.
4. Cuba: The Castro brothers are yet to figure out the internet, let alone Bitcoin.
Where did u find communists are trying to centralize Bitcoin ?
Actually China and Russia are more hardcore capitalist then most of the western capitalist countries .
Your list seems to be missing the UK, the biggest communist country of them all.