As I stated, people tried to annihilate each other in pre-modern times. In modern times, we literally try to do exactly the opposite, and we go so far as to pas

As I stated, people tried to annihilate each other in pre-modern times. In modern times, we literally try to do exactly the opposite, and we go so far as to pass to laws to prevent this even against countries that stand no chance against us whatsoever. Give me an example of modern times and now we're talking. All of the examples you said are so limited in scale to what the Dark Forest actually requires: complete sterilization of all life in the galaxy. To go from "killing bison" to exterminating all forms of life is a gargantuan leap.