Oof, I think there was a convention of some sort hosted in Switzerland that settled some of these ethical questions in a fairly defined way, a little while back.

Edit: this was me being cheeky about the Geneva convention- unlawful deportation is a war crime. For real though, if you aren’t familiar with the Nuremberg trials, the “superior orders defence” has been settled- no ethical quandary about it. It’s illegal to follow illegal orders.