Middle finger musings

Several times over the years I have witnessed someone cutting someone off with their car and receiving the reaction of a hand extended with only the middle finger pointing upwards. I have seen the same reaction when bikes cut off cars or when cars cut dangerously close to pedestrians. This gesture is used with the intention of causing great emotional stress in retaliation for the stress that someone else's actions have caused. 
What makes a person think that flipping someone off is going to elicit any sort of agitating feelings in the object of the gesture? Further what causes the person who is flipped off to take offense at the gesture? There is no animal that takes offense at the motions of other animals. If we are nothing more than higher animals you would think that we would surely have evolved past this silly self destructive behavior. Survival of the fittest would require it. But for some reason we seem offended by this waving of a limb in a mean spirited manner perhaps accompanied by an expletive or two. Why? I believe that this action and response is an assault on man's dignity. Which begs the question where does this dignity come from? It assumes that man has intrinsic value. But if he is just another animal why does he have intrinsic value? Why does the individual matter? I believe that without realizing it that every time man makes an assault on another persons dignity they are giving an acknowledgment that man has dignity and value. I believe that if you look hard you will be hard pressed to find a reference point for man's dignity and value in nature. Certainly the animals do not exhibit anything even close to this. So where does it come from except God. I believe that the fact that God created man in His own image is the answer and true reference point for man's dignity and why he has dignity at all. Ultimately when you see someone flipping someone off remember that unintentionally they are acknowledging that man has dignity derived from His creator that he can effectively assault. Once again we see that pagan man cannot get away from admitting he has a creator no matter how much he may want to. As we seek to live a God focused life things like this should strike us more and more with the constant reality that God truly is with us (Romans 1:20). Every day all men every where live before His face. Sometimes pagans end up pointing to God in a way that they never intended.