Earlier quoted context omitted.
Don't be naieve, you tell me that a band of hunter gatherers would hesitate to kill/oppress another tribe if they were strapped for resources? "According to you", the entire world lived in a system where everyone was picking daisies and being sweet to each other prior to 10,000 years ago? Also, how is communism like how people lived prior to 10,000 years ago?
What resources does a highly migratory hunter-gatherer band actually have to take? The whole point is there is no surplus production. Also, how exactly would one band of hunter gatherers continually oppress another band of hunter gatherers over a period of time? It's not really possible, for a variety of reasons. How is communism like how people lived 10,000+ years ago? Communism is how all people lived 10,000+ years…
Food.
> how exactly would one band of hunter gatherers continually oppress another band of hunter gatherers over a period of time?
They wouldn't, they'd just kill them before the need arises. But if they really wanted to, out of greed or laziness, they'd do what humans have done for thousands of years. Establish a hierarchy based on power and violence, and extort taxes.