As Nazi persecution intensified from 1941, evidence suggests that church attendance increased and many churchmen put their own freedom and lives at risk to uphold their beliefs.
The most damning opposition came from individual clerics, including Bishop von Galen, who delivered three sermons in 1941 which condemned Nazi euthanasia policy. His attacks were so powerful with his congregations, that the authorities recoiled from arresting him and actually stopped the programme.
But, the churches posed no real active threat to the strength of the Nazi regime.