yeah, I was thinking this too, I kept remembering that scripture about them trying to hide under rocks and in caves.
at the part when everyone is taking the car and then everyone is going to get on the boat i was calmly watching but then it really hit me about what they were showing mob mentality. and that one day all those hordes of people would be trying to get at me to torture with all their rage gave me one of the most deep set fear and cold sweat in the theater i have ever had. that is why this movie was so frightening.