Decided not to intervene? What exactly do you call our efforts in WWII? I guess we could have sent Hitler a sternly worded letter, but until his military was destroyed, I don't think he would have been inclined to listen.
What would bombing Auschwitz or the rail lines leading there have accomplished? Had we bombed the facility itself, with the "precision munitions" available at the time, we would have just been directly responsible for the deaths of the Jews imprisoned there. Cut rail lines would have been repaired in a day, or two - the nazis were quite adept at that. And even if we had destroyed that particular camp the nazis would have simply gone back to the simple expedient of mass shootings and mass graves.
Hitler wanted the Jews of Europe exterminated, by whatever means, and it only stopped when the Allies broke the back of the nazis. Unfortunately for the Jews and other victims of the nazis, it took us a few years to accomplish.
I suppose you have a good excuse for Yalta too?
Defenders of petty politics then, are likely defenders of petty politics now.
Check out the evidence in the books I cited, available in its summaries before you defend the scoundrels with patriotic claptrap.