The Nazis also hated Catholics, and persecuted them sort of like Obama is doing today. But we’re not supposed to learn lessons as a result of the Nazis, are we? It’s unfair or something.
The Bolsheviks and Marxist Communists hated Eastern Orthodox Christians and murdered somewhere around 30,000,000 of them, making Hitler’s holocaust appear mild by comparison. And then as you noted, we are not to learn lessons resulting from real-life applications of murderous hate. First of the Christian God declared dead by Nietzsche, then of the Body of His Church.