I've come to the conclusion that the average driver is oblivious to what is going on around them. Half the people don't stop behind the white line and if they are turning right most of them don't stop at all.
So the driver is a jerk because they are inept. Your friend was being a jerk on purpose.
Right, 2 negatives in this situation don't add up to a positive, that's the easiest way to tell it was an illogical act.