Capitalists are going to oppose communism and socialism no matter what anyways because it threatens their wealth. They are doing well under the capitalist system but the ones who have real power and wealth wouldn’t have it under other systems, so they will use whatever words to prevent it, and if that fails, whatever force they can muster.

Whether or not communism can work is a seperate debate, but IMO it’s important to realize that those who benefit the most from the current system will go to great lengths to protect it, resulting in many bad faith arguments that don’t make sense. Trickle down theory was another one of these.