Learn a bit of history. There was nowhere to go during or prior to the war. A handful of visas were available here and there, some due to the work of heroes like Sugihara and Wallenberg (HY”D). The US did not even raise its quotas during the war and those quotas went unfulfilled. The whole argument is moot; the Shoah was a gezera and part of that gezera is that no one wanted to stop it by providing a refuge for Jews.
(And no, our lesson is not that we need a medine. There is only ONE place in the world where a maniac can kill millions of Jews again – and a regime of maniacs in Teheran is developing a way to do just that in one fell swoop. I suspect that before such a thing happens, the US will turn its back on the medine to save itself and save its access to Gulf oil, and that will bring about Reb Yoilish’s prediction of a peaceful end to the failed experiment that has cost so many lives, physically and spiritually.)
As for the calumny about the leadership saving itself – just think what Yiddishkeit would look like had a handful of leaders, some of whom were actually in the concentration camps, not made it to the free world. It was only one rov who could be accused of saving himself or being saved by reshoim in any event, and the accusation is not true at all. His escape was paid for with funds from the Torah-true community and not by those who ran the train.
Hashem has His ways. The churban is something we will never understand.