Katan, I went to re-read a sefer of articles and letters from Chofetz Chaim in 1930s. He writes about different tzoros and wrong things people were doing, including sending children to non-Jewish gymnasia, non-religious or “cultural” schools. I could not find so far any criticism of RZ or even Z activites or schools (the publisher is charedi).
The fact is that those who followed Zionists to EY mostly survived and are Jewish. A large portion of them is shomer shabbat or “traditional”. Even those who are not observant (and most likely whose grandparents were not observant with or without Zs) are still Jewish and have a chance. A large number of people who never heard about Z, either post-WW2 or Sephardim came to EY without any ideology, but still benefitted. Those who listened to R Elchonon in large part perished, as did he. Those who survived and ended up in other countries also suffered high intermarriage rates. I am not sure how else you interpret these facts.
> You can look up the Satmar Rav’s holy words and see what he wrote. You can then take that to your LOR and ask him for details and see if he can provide to you those details if you’re really that curious.
You provided the words. We provided analysis that shows that the Esav idea, while reasonable at a time, does not match recent history. If you do not have an answer in your mind, maybe you can ask or write a letter to someone who share your views and share their answer with us?