He knew a lot about his grandparents - and perhaps he feels he's been endowed with abilities to go into people's heads who are long dead - but, to a certain extent, he's making it up.
What happened on September 11th is at least, theoretically, small stuff compared to what can happen.
I love America more than any other country in this world, and, exactly for this reason, I insist on the right to criticize her perpetually.