"Lawful" as determined by the party executing the action is very different from actually lawful.

The courts can intervene later, but they can't un-bomb a hospital.

This is setting aside the obvious problem where governments will often set laws based on self-interest rather than morality, particularly when it comes to military conflict.

Lawful use in the US is whatever Dementia Don says it is.

This government doesn't GAF what is "lawful" and what isn't. Was what happened to Pretti and Good in Minneapolis lawful? Would you work for ICE/CBP with no qualms at all?

See also the new national sport of hunting for fishing boats off the South American coast. Is that "lawful?"

And yes, since you went there: everything the Nazis did was "lawful." To the extent it wasn't "lawful," they made it "lawful."