I cannot argue with your point. Your last paragraph, in particular, is not only well said, but very true. I believe it as well.
I have an issue with the word “communism” because in its modern sense, it is not understood in the way perhaps it was intended, and, so, like many words, it’s meaning has changed.
I consider communism a Godless, fruitless, and very evil thing. But, as you said, considering the spirit and nature of men (ourselves), it never will work.
Yes, it is true that the Church described in Acts 4:32 is an example of a communist society. I am willing to acknowledge that there were two times in the history of mankind that communism actually worked:
1) Prior to the Fall.
2) The Church (the community of Believers) described in Acts 4:32.
Twice in the entire history of mankind it worked.
All other instances: A complete and utter disaster. There is no other form of government that deserves such disdain and rejection. Over one hundred million killed by malice, neglect, greed, incompetence (Mao's wonderful 'industrial revolution', and the Soviet Union's great ventures in economic planning starved tens of millions), and hatred of mankind. Anyone who tries to foist the Acts 4:24 Church as an example of Communism in action needs to have it drilled into their head that it was a unique perturbation - Not a possibility with the current state of man.
What was the difference in the two cases where communism 'worked'? - God HIMSELF was the Head of the Government. In one case (pre-Fall), the people themselves were perfect. In the second case (Acts 4:31), the people were all filled with the Holy Spirit...
But where sin is active, and where not all men are Believers -- we have ample evidence of what happens when this form of government is followed -- a descent into a man-made hell on earth.