I don't know if it's all coincidence that happens to fit together quite well, intentionally put in there, or some psychic/major trauma event/that can operate on subconcious level and transcend space/time, etc. That movie though is a far better prophet than the WT though!
Well, your subconscious travels with your physical brain. Unless you've evidence otherwise, not sure why you would even consider that. And it didn't "predict" anything. There was no way to know what event to look out for until after the event. That's not "predicting". Without prior knowledge, there is no way to make it intentional, unless you're suggesting that back in 1983 the 9/11 event was planned knowledge of that event was widespread enough that a Hollywood director had knowledge?
Looking just at their idea, it fails on the opening idea. The terrorist didn't attack the mall, they were there to murder Doc Brown. Fail.
I ask again, why don't you know what to think using basic reasoning and observation skills?