This is backed by evidence.
After WW2 there was a lot of research about weather people knew or didn't. Basically the conclusion was: people knew. They actively decided to either ignore it („not my department“), deny it („it's all lies, the scent is just $foo burning“) or justify it („they deserved it“).
But people knew.
Am I the only one who thinks that the text looks like generated by ChatGPT? At least everything after the first paragraph?