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That first link is pure cold warrior nonsense
Lenin and Stalin did more harm to socialism than any other people in the entire history of mankind. You are a 20th century fossil. Soviet genocide are well documented facts. Here you go…
https://en.wikipedia.org/wiki/Excess_mortality_in_the_Soviet_Union_under_Joseph_Stalin
https://en.wikipedia.org/wiki/The_Gulag_Archipelago
https://www.sciencedirect.com/science/article/abs/pii/S0967067X97000111
https://www.chinafile.com/library/nyrb-china-archive/who-killed-more-hitler-stalin-or-mao
https://news.stanford.edu/stories/2010/09/naimark-stalin-genocide-092310
https://www.reddit.com/r/history/comments/ezpp8k/how_many_people_did_stalin_actually_kill/
https://allthatsinteresting.com/how-many-people-did-stalin-kill
Literally a 100% history book. 2000 pages of specific details. And literally nobody in the Soviet government ever claimed any of it was not 100% correct.