Any rational capitalist (or more realistically, mixed market supporter) should agree that other systems are theoretically possible, and should probably even support small scale scientific tests of whatever people want to realistically propose.
This already happens with tests of UBI occurring all over and examples of coops existing in many places as well. UBI is too new to say but looks promising, and coops seem great in certain areas of the economy if properly supported but not optimal everywhere, as far as I’m aware.
However, if someone thinks their system can only work with absolutely everyone in society participating after a revolution where the sinners (whoever they are) are eliminated, they really ought to recalibrate their beliefs or join a militia if they’re really serious.
Who trampled on the Russian tomatoes? (Don’t say the Nazis, they trampled on everyone’s tomatoes including their own) For Russia, there was some small scale support for the whites during their civil war, but otherwise trade between the Soviets and the west increased year by year during the NEP period until Stalin purposely contracted it (if someone knows more about this period, feel free to correct me. I’m working off of information I learned in classes years ago and this article that matches with what I remember). I’d propose that the Soviet issues were internal due to blindly ideological governance that crippled their economy and society. They didn’t have to make such an insane number of nukes, create the culture that caused Chernobyl, nor invade Afghanistan.
Otherwise, who trampled the Mainland Chinese tomatoes? They basically won their civil war, their only issue was blind allegiance to chairman Mao that resulted in disaster after disaster. The West didn’t force them to try the Great Leap Forward, the Cultural Revolution, the Down to the Countryside ‘Movement,’ nor the One Child Policy. The CCP did those to themselves, and they only found success once Mao died and they made their economy more capitalistic.
And then once more, who trampled on the North Korean tomatoes? At the beginning of their war, they tried to crush the South’s tomatoes until a UN authorized force pushed them to the Chinese border and then a Chinese force counterbalanced to the current borders, but otherwise the North was economically better off once the stalemate began (the Japanese centered their industrial developments in the north). North Korea failed because of dramatic mismanagement and a ideology of constant militarism while the South, with ups and downs, prospered.
Sure, there were military actions, police actions, and garden trampling that harmed both sides during the Cold War, but you can’t just blame your enemy for beating you, you have to recognize why you lost.