These things are necessarily correlated and I'm not sure the necessity of drawing the line. Why not just use another term?
It seems to me we are making a rhetorical space for bourjois marxists. Why?
??? Academically they're interesting questions to ask? Have you ever taken a class on Marxist critical theory or Marxist feminism or ...
A "marxist" is someone who uses Marx's method of analyzing class and capitalism to talk about whatever they want. One specific example is a Marxist critical theorist I know who likes to discuss the way class and capitalism as Marx discussed them arise in philosophical interpretations of modern literature.
Marxism is a political philosophy - one that has a lot of negative connotation in the United States due to its ties to communism, but Marxism is just philosophy so of course we'd want a space where academics can talk philosophy.
See this comment for a better explanation https://news.ycombinator.com/item?id=15512846