As far as I am concerned, one need only be a fan of Marx to be a Marxist, period- no litmus test required. The Stalin argument is one more pointless red herring, much like the endless Castro fanaticism that seems to overtake nearly every other thread on this site. I am more concerned with theory than with unquestioning support toward certain leaders' varied practices of it. As far as I am concerned, it's Marxists for Marx, and have a nice day.