That completely contradicts what Hamilton says though, and he was in the car. He thought he was past Webber and can't see him, which is reasonable because Webber takes the dirty inside line. Webber can't stop the car appropriately on the marbles and hits Lewis. Which 99% of the time results in front suspension damage.This.
He chose to be ultra aggressive in an attempt to close off the line. It didn't work.
He was defending because he hadn't yet been completely overtaken. He's certainly not trying an overtake of his own, when the other car hasn't managed to get more than half the car in front.
Some people are forgetting that Webber is halfway alongside Hamilton at the apex of the corner due to his entry speed, which is too fast to maintain his line. Hamilton doesn't give him the space because it is definitely not his prerogative to. Just as Massa closed Hamilton out at Monza, Hamilton does the same to Webber, whether it's coming from behind or partially overtaken is irrelevant, the cars are in the same positions, halfway alongside at the apex.
It is through Webber's misjudgement of the corner and luck that he doesn't come away with a DNF due to front suspension damage and removes Lewis at the same time.