MDD
The situtation between 1900 and 1940 in the US did not change, In fact it might have been worse, At least the first generation did keep many things, the second generation less so.
Yet in the 1940’s when Rabbanin did come to the US because they were forced and the situation did change for the better.
Imagine if those Rabbanim who came when they were forced when the Nazis came had come 50 years earlier. How much better would the situtation had been