Complex sentence: Rabbi Blau was a native of Meah Shearim in Jerusalem and was active in the Agudat Israel during the British Mandate era however by the 1930s the Aguda began to adopt a more compromising and accommodationist approach to the Zionist movement.
Split into simpler sentences: Rabbi Blau was a native of Meah Shearim in Jerusalem and was active in the Agudat Israel during the British Mandate era. However, by the 1930s, the Aguda began to adopt a more compromising and accommodationist approach to the Zionist movement.