It's unlikely the US could have done anything, even if the Jews had been united in requesting the bombing. Because Poland was so far east, it was difficult for the allies to reach it with bombers or any other kind of support, including when the whole of Warsaw fought against the Germans during the Warsaw uprising.
In any case, I'm not crazy about the Holocaust Memorial on the mall criticizing the US performance in World War II. First of all, why does the Memorial only remember the Jews, when Gypsies (or Romas) and blacks in Germany were subject to almost the same treatment. While Polish Christians may not have been singled out to be gassed as the Jews were, many ordinary Poles died in the death camps from disease, starvation, overwork, etc. Are their deaths less important than Jewish deaths? And what about all the others who died in World War II, tens of millions of Soviets, millions of Eastern Europeans, not to mention allied countries. Are they chopped liver? Jews ignore the deaths of gentiles while they mourn the deaths of other Jews. And we have a monument on the National Mall that criticizes America for the way it fought World War II, which of course included liberating the surviving Jews at Auschwitz and the other death camps. Maybe the war profiteering Jews who stayed in America and became rich off the war would have been happier if they didn't have to face the death camp survivors.
