Interesting topic, I've had a similar question but concerning the Nazi reign in Germany rather than during the Weimar Republic. All that we learnt about religion in the Weimar Republic was that it continued as per usual for the major part. Religious freedom was granted in the Constitution. The majority of Germany was either Protestant (North) or Catholic (South). Jewish people in Germany lived without too many worries, but with the rise of anti-semitism with the Nazi party, this changed. The Jewish people were classed by many as part of the 'November Criminals,' from the stab in the back myth, and so anti-semitism existed to an extent from the beginning of the Republic. The Depression hit the Protestant group more harshly due to the general demographic of that group. This led to a raised vote for the Nazi party during the Depression from the Protestant group. That's all that Webb and Dixon and Dennett say on the subject - in the syllabus there is much more of a focus of the effects of Nazi rule on religion and opposition from religious groups to Nazi rule.