When this guy, whoever the heck he is, challenged Molyneux's assertion that the Left has a strong Marxist bend-- "I don't ever hear them say they're Marxist!"-- I wish the latter would have used this as the central piece of his argument:

Classical Marxism says that there is oppression between the classes: the "haves" and the "have nots". So, the "have nots" need to enact a massive State apparatus to ensure "social justice" by using force to "reclaim" from the oppressive bourgeoisie what was stolen from the oppressed workers. Once that is done, the State apparatus can dissolve, since utopia will have been established.

When it became obvious that Marx's predictions were failing and that his prescriptions were turning into nightmares, thinkers who later became referred to as the "Frankfurt School" said that it was because Marx oversimplified the problem by not defining it broadly enough: oppression takes many forms. Society needs to then not just be deconstructed according class lines then, but all conventions need to be blown away and re-built.

That's from where the modern-day concept of "intersectionality" comes. The idea now is that the State needs to use force to ensure "social justice" to "protect" all of these "marginalized categories". Just walk up to some random Democrat on the street, not to mention the presidential contenders, and ask them if the government needs to forcefully step in to "right historical and systemic injustice." One hundred percent of them will say "yes".

This kind of thinking is so prevalent among even "centrist" Democrats these days that corporations-- even my own employer-- disproportionately hire and promote women simply because they have vaginas, giving the "Frankfurt School" explanation about "correcting for systemic injustice". It's taking over advertising, music, cinema, video games, college campuses, and elementary schools: it's all-pervasive.

The fellow is right in the sense that modern Leftists aren't "classical Marxists" who want a "proletariat uprising": that kind of Marxism is dead. Instead, it's been replaced with a new style of Marxism-- called "Cultural Marxism". And this new Marxism is treated as absolute gospel by virtually all modern Democrats, even the "moderate" ones.

As one final note, go read the "Green New Deal": a total Communistic take-over of the economy to achieve "social justice goals". It even applies "intersectionality" to nature: "environmental justice"!