This hatred was gradually developed by humans. From ideas, words, stereotypes & prejudice through legal exclusion, dehumanization & escalating violence... to systematic and industrial murder.
Auschwitz took time.
https://www.ft.com/content/737b609d-d660-4f91-a016-740d9c476642
https://www.ft.com/content/737b609d-d660-4f91-a016-740d9c476642