In college taking a social theory class, I thought I agreed with the ideas of Marxism; it sounded appealing, destructive and the like. A bit later in life though I realized that Marxism is just an ideal. Once the end-game of Marxism is achieved, then what? There is no plan for what to do afterwards, just always the perpetual keep on trudging forward towards the goal.
I've thankfully since moved away from identifying with such a theory but it was interesting to be able to think of it prospectively and realize that it was just an incredibly destructive path, we are better than such destruction.