How do people deal with left-leaning liberals that see that capitalism is leading to the inevitable destruction of human society, even recognize Israel is committing genocide, and other progressive opinions but refute every revolution or revolutionary action. The "communism won't work because human nature", "the USSR was communist", "(Stalin|Mao|Castro) killed x million but the US killed 5,000 in industrialization", state dept. parrots. How do people talk with those that get so close but refute any praxis. I know this topic has been discussed before and links to other talking points would be good.