Sorry I'm really dumb. As I said, I've watched the thing 30 times as I've said but I never watched it past the finish line. I didn't even realize that they showed the slo-mo replay.
Yes that makes it pretty obvious that it was El G's fault. Morceli's foot DID go way way out, but that was clearly as a result of El G hitting it, not of Cacho or some deliberate thing.
Sorry. Should have watched the whole thing