I don't think that his involvements in WW I are justified by his achievements in chemistry in favor of world population problems. Someone else would have found a way to bind nitrogen without him and so feed billions of people in the end. Much later perhaps, but eventually still. Yet, most of today's populus have barely enough to eat. So, ultimataly the problem remains unsolved, or it shifted even.
Haber was not a solution. He was as tragic and as fanatic as everybody else in Europe at that time. Nazi Germany also have invented A LOT of world changing things. They solved a lot of problems. Yet, they managed to do such unspeakable things that all the good stuff instantly fades.
In my humble opinion, it's not difficult to judge a person who commits unspeakable crimes by his good or bad deeds. Good deeds are optional, always. Bad deeds are never an option, regardless of eventual outcomes or consequences.
Haber was not a solution. He was as tragic and as fanatic as everybody else in Europe at that time. Nazi Germany also have invented A LOT of world changing things. They solved a lot of problems. Yet, they managed to do such unspeakable things that all the good stuff instantly fades.
In my humble opinion, it's not difficult to judge a person who commits unspeakable crimes by his good or bad deeds. Good deeds are optional, always. Bad deeds are never an option, regardless of eventual outcomes or consequences.