We always had the choice: give up (or at least compromise)on frumkeit or face persecution. A Jew not wanting to be tolerate persecution need only to give up on Yiddishkeit. There is strong evidence that many did decide to give up on Torah and Mitsvos in order to reap the benefits of being part of mainstream society. For the most part if we “knew our place”, we were allowed to be as frum as we wanted. If the Israelis adopted the same policy as the goyim did, there wouldn’t be an issue. In return for accepting second class status, we were allowed self-government and complete autonomy in such matters as law, education, welfare, etc. Kashrut and Bris Milah were never an issue. Our status was not all that different than that of African Americans prior to the Civil Rights Acts in the last century – except that we always had a choice, and our ancestors made the decision to give up on parnassah and civil rights in order to be free to be frum.
Given the 1929 was in the zionist period, with evidence that the British and Zionists were involved (contemporary accounts indicate that both had prior knowledge of the pogrom, making one suspect the Brits were involved as agents provacateurs), that shouldn’t count. Shabatai Zevi also shouldn’t count since he was trying to seize Eretz Yisrael by force. I seriously doubt anyone fled Tach v’Tat (1648) by moving to Eretz Yisrael given the distances involved – people fled to the nearest territory controlled by the Poles or Hapsburgs, which were around the corner.