1000's of people "worked on" nazi germany and soviet russia and communist china and countless other nightmares.

Your reasoning is flawed. People go along to get along. It takes real courage to speak against the evil, especially with livelihood at stake
https://twetch.app/t/caf21e0625abca9df2957762f468371e070a4f32ea41c3783ec33c5bb6c1b9bf