who are these people, i’ve only heard of marx and engels.

Yes, and this is why…

and right-wing propaganda is as perfectly fine with conflating everything “leftist” with the technocratic (ie authoritarian) left as tankies themselves are.

There are two sides to the left… and they are violently incompatible. You’ve never heard of that other left because both tankies, fascists and capitalists like pretending that there is only one.