and that came AFTER the axis powers attacked Pearl Harbor......there was NO response prior even when news (though limited) was leaking out about the final solution
Genocide has been part of the human experience since at least records started being kept. Our consignment of Indians to the most barren lands wasn't precisely genocide, but it wasn't a walk in the park for them, with many dying from malnutrition-induced diseases, starvation and exposure. There were also other genocides during the 20th century in response to which we did even less than we did for the Holocaust. We did not go to war over either the Armenian or Ukrainian genocides, and we certainly did not hold war crimes trials for the perpetrators of those atrocities.
Yes, that is when it came, when else was it supposed to?