BIRUR: Did you look at the dates of the two lettes we are discussing?? The letter that you rely upon (a private one, by the way) was written in 5703 -that is 1943 !! The horrors of the Holocaust were not well known yet and ,obviously, the medinah was not established yet.
The second letter (mentioned by yoshchayal and a public one) was written in 5714 -that is 1954 !!! ten years afetr the catastrophe of the Holocaust was discovered and after the medinah was established.
Whatever was motivating Rabbonim and Gedolim before the Holocaust and certainyl before the establishment of the medinah changed drastically after these events. As in Sifrei teshuvos with regard to teshubos, I take the later letter as the autoritative one.