Thats shocking to me
Thats why I am not so sure you want to investigate further
Google Bundism. It was the most popular philosophy of Pre-war eastern Europe. Its been almost totally forgotten. It was basically Secular yiddishism with a socialist bent. They were anti-zionist, Pro-Yiddish , Pro Labor and wanted to stay in Poland but with equal rights for all.
Ive been to Prague and Budapest and the largest synagouges there are not orthodox. The largest and most beautiful synangouge in Prague is not the Altaneushul (Maharal Shul) but rather the Reform Spanish Synanoguge
And in Budapest the largest shul in Europe (not just Hungary) is the Dohany Street Synangouge, which Im not totally sure what it is because women sit on a differnt floor than men, but there is an organ used on Shabbos (Played by a non-jew).
In Vilna Rav Chaim Ozer was never able to become chief Rabbi of the city because the secular elements were able to block him, they were so powerful (The Chief Rabbi in Europe is a government position and carries the weight of the law behind you in enforcement)