Marxist, certainly - fool, I think not.
I'm of an age to remember Ali and the IMG (International Marxist Group), a time that kindled my interest in politics. At a time when politics has become a short game of "what'll get us (me) elected?" We **desperately** need people of all shades of politics who will fill the gap with well-argued polemic and who are committed to ideas, concepts and movements.
My politics are pretty far-removed from Ali's these days, but I always find him interesting to listen to and to read. There are precious few people currently writing about politics about whom I would say that.