It seems a bit unrealistic that a goverment that is either led by Zentrum or that Zentrum is a part of would pass a law relaxing abortion laws, seems even more unrealistic that Zentrum would get a bump in the polls from such a law. Why would conservatives/reactionaries see Zentrum unable or unwilling to stop a law loosening abortion laws and then decide to switch from the NSDAP to Zentrum?
Viewing post in Social Democracy: An Alternate History comments
The law can only pass if the SPD + DDP + KPD has a majority, and the SPD controls the chancellor. My reasoning about Zentrum getting a bump is that passing the abortion law will increase political polarization by religion; Zentrum is an explicitly Christian and Catholic party while the Nazis had an ambiguous relationship with Christianity, so I think Zentrum would be better placed to benefit from this polarization.