This article doesn't understand what Marxism is, many of the ideas represented as "Marxism" were shared by many philosophers prior to, during and after Marx's l

This article doesn't understand what Marxism is, many of the ideas represented as "Marxism" were shared by many philosophers prior to, during and after Marx's life. They don't in anyway define Marxism. Why some people insist on referring to all leftist critiques of the status quo/capitalism as Marxism and then complain about the intellectual babbage attached to that term is beyond me.