It was done because of religion, under the direction of religious fanatics. Nazis we Catholic and I’m pretty sure operated with the blessing of the Vatican. Same with all the Christian holy wars. That’s why it’s relevant. The good in the world would still exist without religion, but all kinds of evil is carried out because of it, it’s used to convince people they’re the chosen ones and thst anything they do is correct, no questions allowed. Sure evil would still exist without religion, but you wouldn’t have this “Divine right” to justify things that people would otherwise question or not go along with otherwise.
It is certainly true that people have done innumerable horrible things in the name of religion, but this seems false? I’m not an expert or anything but two minutes on Wikipedia is getting me stuff like
To many Nazis, Catholics were suspected of insufficient patriotism, or even of disloyalty to the Fatherland, and of serving the interests of “sinister alien forces”.
Biographer Alan Bullock wrote that, though Hitler was raised as a Catholic, and retained some regard for the organisational power of Catholicism, he had utter contempt for its central teachings, which he said, if taken to their conclusion, “would mean the systematic cultivation of the human failure”.
A pre-war critic of Nazism, Pius XII lobbied world leaders to avoid war and, as Pope at the outbreak of war, issued Summi Pontificatus, expressing dismay at the invasion of Poland, reiterating Church teaching against racial persecution and calling for love, compassion and charity to prevail over war.
Pius XII employed diplomacy to aid victims of the Holocaust and directed the Church to provide discreet aid to Jews.