The law of bombing civilians

The law of bombing civilians

People hate the people who are bombing them, regardless who they are.
Late July 2006 Israel bombed a city in Libanon and it happened to kill a lot of children. There are not many people in Libanon left who do not hate the Israeli.
The Germans started to bomb London in 1940 and the British started to drop their firebombs on Dresden and Hamburg and in the Ruhrgebiet. Deep mutual hatred ensued. The Russians bombed Berlin, just for fun and without any need, actually, for the German army was very weak. The result was that people in Berlin who first were against the Nazi's and Hitler and pro Allies, all of a sudden started to resent and hate the Russians.
The United States bombed North Vietnam almost flat. Yet it lost the war. Every Vietnamese had started to hate the Americans.
Now, 2017, we have an American president who is a great fan of "bombing the shit out of" anybody who opposes him.

All of the governments of the above instances are, apparently, oblivious of a natural law of social psychology. And that law is