From what I know about Germany, they don't teach anything about the depths humans can go or how to prevent them recurring. They seem to just learn the Nazis were evil people and as long as you're not one of those, similarly evil things can never happen again. Also because only evil people can do evil things, calling out an evil thing is illegal because it implies someone involved is evil and that's an attack on their honour.

See Germany-Palestine relations. One third of weapons used in the Gaza war are paid for by Germany, and the remaining two thirds by the USA. Other countries contribute negligibly.