mdd- please see my comment. The facts are that Rommel did not get to Palestine- he was stopped at El Alamein. You cannot speculate on what might have happened- it did not happen! So, the fact that many Rabbonim pre-war told their followers not to go Eretz Yisroel was an error, Again-no blame attached to that but just an understanding that Gedolim can err – certainly in ‘milei de-alma”.
Additonally,if you believe that everything is “min hashomayim” why don’t you believe that Montgomery’s victory at El Alamein was “min hashomayim”-so as to save the Yishuv?
Lastly, even “leshitsoscho”- Munich 1938 was over a year before the conquest of Poland and the Evian conference in july 1938 made it abundantly clear that Jews were not welcome anywhere. Many rabbonim still did not advocate to leave Europe.