A political philosophy based on class warfare requires economic authoritarianism, which inevitably leads to authoritarianism in all other aspects of society.
Marxism goes back 150 years now — we've seen this before. Believing otherwise is just naïve.
Sadly too many have been indoctrinated ["minds full of mush" as Rush calls them] and why we see polls where "I'm okay with socialism" scores so high.
They've been taught that capitalism is EVIL and that socialism is FAIR.
The Left keeps its foot on the throat of capitalism, the economy suffers, jobs dry up and these "minds full of mush" think that's because capitalism has failed. It's more that socialist indoctrination, coupled to liberal politics put into action, has won.