1) Probably an irresponsible driver. Won't say more.

2) I'm disturbed by how the passenger door caved in to that extent. BMWs have that "hook" between the door and the door frame that is supposed to prevent the door from being pushed like that into the passenger cabin. Must have been going hella fast for physics to overcome BMW's rigid design (and this applies to much of the damage, not just that door).

If there had been a passenger in that car, he/she'd be dead.