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Let's just not treat history textbooks as the ultimate truth. Only our press is worse than our history textbooks.
Arguments against the idea that the USSR had communism:
1. Under communism, the state withers away (I hope no one denies the fact that the state existed in the USSR).
2. Communism and the market cannot coexist (but the market did exist in the USSR).
3. Money also withers away under communism (this was only the case in 1917. And also in the early 90s, when salaries were not paid for months).
I can provide other arguments, but these are enough.
Now about the Native Americans. Do you think the colonists in the USA peacefully herded the Native Americans into reservations? The foundation of the USA's prosperity during its formative period was a lot of land. And they took that land from the Native Americans, killing those who resisted. How many Native Americans are there in the USA now? All the lands west of the border established by the English Parliament in the 18th century were Native American territories. Do you think that if the USA only included the lands of the 13 founding states, it would have become such a power?
And there's really no need to argue. Although discussions can be held. I apologize for getting carried away; the accusation of betrayal really bothered me.