Marx did indeed about Inclusion/Exclusion.

He didn't like private property, because private mean's your have the right to exclude others from it.

He also said private property perpetuates exclusion.

**Exclusion and estrangement:** Private property perpetuates exclusion and estrangement, as individuals are separated from their fellow human beings and from their own humanity. This is evident in the way people are reduced to mere commodities, with no inherent value or dignity (snippet from “Economic and Philosophic Manuscripts of 1844”).

But it's not about what the Marxist religion started out as under Marx. It is about what his followers have turned it into after his death. That's what really counts.