As a German I am a bit saddened that you are coming to defend some of the most murderous tools of mass annihilation.

Zyklon A (the predecessor product) was banned after the first world war due to its use as a weapon in the war.

And Bruno Tesch - the inventor of Zyklon B - was executed in 1946 for knowingly selling the product to the SS for use on humans (at least according to Wikipedia).

In essence, the people in Germany knew very well what their leadership was doing and they supported it. Too few were ever held accountable.

This is not about vengeance (there isn't such a concept in the modern justice systems, right?). It is about accountability for your own atrocities. Germans grow up learning this in the hope it can prevent another event like the Holocaust.

This kind of accountability extends to everyone. Even scientists in the trenches who participate developing those technologies that might be misused.

Once again you just keep asserting things without any evidence and in its place attack anyone who asks for it as “defending murderers” as if that is a foregone conclusion. This is the logic of charlatans and liars my friend. Think a bit harder about why you believe these things and if it is evidence and not emotion share it with me please.