“Seriously?”
Half your statement isn’t blatantly obvious.
“I believe its safe to say that ANYONE (Rabbi or not) who told people in the community to STAY IN NAZI GERMANY while they could have escaped to America was wrong in retrospect to give such advise. Does anyone disagree with this?”
HaGaon HaRav Elchonon Wasserman ztvk’l hy’d disagrees with you, if the circumstances would have put one’s spiritual life at risk, as he stated being rescued by YU would do. (And as the majority of frum Jews who came to America in the many decades before WWII became non-frum in America.)