Well, it looks like his argument is that looking for equality of outcome requires that you believe all people are equal. To be able to achieve an equal outcome in a world where people are not equal in ability or desire would require that you force people to conform to your view of equality. That desire for equality of outcome, instead of equality of opportunity was the underlying principle of Soviet Russia, and Mao's China.
Also, I think you got something backwards. Its not that equality leads to Marxism, its that Marxism leads to an attempt at equality of outcome.
Saying that you think pushing equality of outcome will lead to a society that has millions die like they have in the past is vastly different than saying there is a conspiracy to murder millions. The biggest difference is intent. I don't think climate change deniers are part of a conspiracy to murder millions, but, that is what would happen if we do nothing.
I don’t really feel like arguing the nuances of my statement. He clearly believes equality movements are part of a conspiracy by Marxists to seize control and that such control will lead to the deaths of millions.
By any measure that is a batshit insane idea. It is also a deeply ignorant and stupid idea, but as with climate change Peterson seems to have transitioned to making a living by opining about things he doesn’t understand.