The US never showed the kind of resolve and integrity in WW2 that Hamas is showing in WW3, and the US weren't even the ones targeted with genocide in WW2.
Poland does not seem to be very actively involved in genociding Gaza.
Not every country is equal. Not every country is full of people evil enough to do genocide. People aren't all the same.
It made sense that the Americans would do genocide less than a century after saying it was OK to bomb women and children in Germany for being a genocidal country. Hypocrisy and hypocrisy are core to the American identity.
It makes sense that Israel would do genocide while acting victimized about Germany genociding Jewish people. Genocide and hypocrisy are core to the American identity.
It makes sense that Poland would not be the same way. They were legitimate victims of genocidal German aggression less than 100 years ago.
It seems plausible to me that the people of Gaza can be followed through their children and their children's children and their children's children, etc., for quite a long time without ever showing the same kind of herd mentalities we see in Israel, America, Germany, Saudi Arabia, etc.