I guess japanese military are inhuman like that (?)
Government dogs are government dogs.
The nazi soldiers weren't inhuman.
They were precisely humans willing to follow orders. And even more so, willing to forego responsability because "I was ordered to do so"
That's literally what military training essentially boils down to. Instill the "YOU. OBEY. ORDERS." mentality.
No questions, no challenge, no "my gut says", you hear open fire, you open fire. And don't worry. It's your superior's responsability then.
Nevermind your finger on the trigger.
Not inhuman. Very much humans. But fucking dogs nonetheless.