Wow, good job focusing on minute details instead of addressing the overall point your parent is making.
However, I'll indulge you and hazard a guess:
* The historically naive and somewhat incorrect generalization of some ill-defined "Western" culture (what time frame is he using?)
* the negative portrayal of it
* and the implicit assumption that any part of the portrayal is somehow unique to all Western countries, but not the rest of the world.
I will give you that this criticism of "Western culture" probably doesn't really relate to traditional Marxism, which more or less worked within the framework of Western culture.
I believe your parent might have had the concept of "cultural Marxism" in mind.
Which part of the parent comment was a "marxist talking point"?