[dragonwriter]

> Same question, how could a stateless communism possibly work?

In even Marxist theory, communism-as-a-system (communism-as-an-ideology is simply the ideology which seeks communism-as-a-system as its ultimate goal) is what happens to socialism (which uses the State) when it succeeds and the State withers away.

If the State hasn't withered away, you have (in Marxist parlance) socialism-as-a-system even if you have communism-as-an-ideology that motivates the present use of socialism-as-a-system. You can't have communism with a State.

(Whether you can have communism at all in practice is still an open question.)