This guy is onto something in that liberals don't perceive actions by markets as coordinated political actions. They see it as invisible, since capitalism wasn't formed on the basis of markets explicitly, its formation was couched in more vague rhetoric about freedom, liberty, fraternity. Some aspects of the formation of capitalism took the structure of religious debate, like protestants breaking from Catholicism.

Whereas all socialist movements have been more explicit about the aims and goals. The communists don't hide their intentions. That makes a communist government much more obvious in it's pursuits to the average liberal. It's why statements like "communism killed 100 million people" makes sense to a liberal in a way that a similar statement "capitalism killed billions of people" doesn't make sense to them.

They don't see capitalism as an agreed upon movement or enforcement of certain hierarchies. They see it as full liberation of people and simply the natural consequences of full liberation. But they can see socialism as an enforced structure, since socialists don't hide what they're doing and socialism is formed by a single united working class interest. Capitalists aren't always in unison with one another.