I believe it is dated in May 1940. But even in 1939 (the year WWII broke out) the footsteps of war were loud and clear. They weren’t considering to move talmidei yeshiva halfway across the globe to find a more prosperous lifestyle. He is saying that a ???? ??????? is worse than a ???? ??????
1940 is not 1948 , or even 1945, there is a big differnce between 1940 and 1945 and beyond