Shalom,
I did not research Ford-Morgenthau, but overlooking Poland’s faults in 1920s to stand to Soviets makes a lot of sense to me. There were a lot of very sincere Jewish politicians who were fighting Polish and Baltic governments disregarding Soviet/German threats. If you have specific problems with M report, please tell us. I think the report is somewhere online.
There is a book published in 1960s in Israel by surviving Jewish politicians from Latvia who admit and lament their errors. One episode – USSR, Germany, all minority parties used League of Nations Charter to criticize those governments on their treatment of minorities. (League created these states after WW1). When Nazis came to power, some Jewish organization tried to go to the League, and the response was – sorry, we do not have German Jews registered as a minority, so we are not going to protect them.