Except everyone treated nazis fine till they attacked allied countries. They were in power since 33’. And since 33’, they already were introducing their racial ideologies and opressing people. Kristalnacht was in 38’ and nobody gave a shit. The phoney war lasted till nazis invaded Benelux and attacked France. The Allies had intel given to them straight from Auschwitz about experiments with poison gas and mass murder of soviet soldiers in march 41’, and regular updates up to 43’.

In geopolitics, people don’t really give a crap about unjust treatment, something being unfair, about torture and even exterminations of an entire peoples. It is only used against them when trying to convince their own to not dodge a draft. Morality is mostly for propaganda and flips easily once it’s not convenient to use it. Examples - US and Ukraine, where aiding Ukraine against an agressor was the moral thing to do on the onset of the war, and now out of the blue, Ukrainians are corrupt and cannot be trusted with funding or weapons. US and Palestine - not doing much because Israel is in a very important strategical position, despite thousands of people being killed, herded like cattle, starved.