Exactly this. I've been in personal security seminars and this topic is generally covered and this is instruction: Just. Drive. Away.
People that will not move are threatening your life because they are in league with someone who will pull you out of the car and kill you.
All of these suggestions imply that there are only people in your way.
My husband was at work in Los Angeles when the Rodney King riots started. It was unsafe to stay where he was, as the neighborhood became engulfed in rioters and fires.
When he tried to leave, the immediate streets were choked with cars as the cars stopped in the middle of the street, so the rioters/looters could rush to the neighboring businesses and loot and burn before they got back in their cars to inch forward to the next target.
While he was prepared to run over rioters, there was little, if any, space for him to get around stopped cars. He decided that he would take his chances and attempt to drive on the adjacent light rail tracks if he had to.
Fortunately for him, the rioters were more interested in stealing than they were in attacking motorists of the wrong color and he got home safely.