Sikhism and communism: no straight answers
Too much equivocation and overly learned vocabulary

Blog post entitled "Marxism and Sikhism" cites "basic and irreconcilable differences" to be fair.

It would be necessary to broaden the scope of any investigation of Sikhs for Communism to include neighboring Hindus and Muslims. Communism is not a religion in and of itself but communists will co-opt and use any given organized religion as a tool to control the masses.
And where does Sikhism fit in with respect to Hindu Nationalism?
There are people who "get along" with each other and refrain from openly expressing certain opinions which they nevertheless hold staunchly and act upon secretly at every opportunity.
Are Christians communists? Read Acts 4:32–5:11 for example. Is this merely a religious duty of alms for those who are in need? This cannot be a total abnegation of "ownership" of property, only that distribution should be made to those in need and no claims of ownership against that. But that has to be a funny real estate deed for ten dollars and other good and valuable consideration if Ananias kept back part of the price. And that's Sapphira and not Sappho? Ananias and not Onan? If Plato called Sappho the Tenth Muse, is that then why such "friends" are sometimes said to be Platonic?