In the letter he justifies that these people can’t be negotiated with and the reason why they should be expelled from the land. Von Trotha has command, he mentions in the letter and he will perform his on his own responsibility and behalf and basically saying he will do as he wills and will only detour if given the direct order to stop. Accordingly to von Trotha’s letter he has “detailed” knowledge on central African tribes and believes that “negroes never submit to a contract but only raw force”, which is symbolization another step in late stages of preparation. “In addition, the Herero would interpret any kindness on my side as weakness.” was Lothar von Throtha’s last point in justifying his later actions in attacking the remains of the herero nation. All of this after the attack on Waterburg one can see that he really wanted Herero erased, he even mocked the chancellor's argument on how they can be transformed to a cheap labor alternative.
In conclusion with all the evidence provided, two letters it is decided that Dietrich Lothar von Trotha, German military commander is outstandingly guilty and along with his superiors who ignored the actions of this commander. According to the legal definition of genocide, his actions were committed with the intent to destroy a national, ethnical or racial group.