No very heavy influence of unions and they hate all work being done on Sunday, most Germans have 2 free days a week and Sunday is protected by law. Its based on Christian values but that laws are dating back to the Holy Roman Empire or even further, there is no actual religious influence on that anymore, just nobody wants to work on Sunday and robots being allowed to work on Sunday brings many problems, like companies replacing humans with them or the mentality being changed.

No work on Sundays is based and it will stay based.

More like: Germany has a lot of Christian traditions and has strong workers rights. If you want your workers to work on Sundays you have to get a permit.

Mechanized workers are also workers :-)