The defender was grabbing the reciever. If you were going to make a touch call, it was defensvie pass interference. Of course if you weren't watching when the intial contact was being made by the defender, you could call the offensive interference.
Bull. All of the contact was initiated by the receiver. The defender has every right to where he is standing.
There was some contact around the goal line when the receiver came out of his break on the post and before he reversed to follow Hasslebeck when he started to scramble. That could have been called, sure, but the officials might have thought it incidental as happens on nearly every pass in every NFL game. Pass Interference is a tough rule because it is very subjective and heavily tilted towards the receiver and against the defender (I used to play DB). Just as in basketball, when the offensive player extends the arm, he's going to get whistled for a charge. Same with the receiver in football.