———I sense a big build-up only to be let down.———
My feelings exactly. Besides, if people don’t know that he’s a Marxist by now, they never will.
People can’t make the connection because they don’t understand Marxism, not because of a lack of evidence.
It is one thing to read about it and another to see a video of it. The latter has a far more lasting impact. If all you had were newspaper reports of 9/11, how much of an impact would it make compared to the actual videos?