To be clear, the term protestant is something different in Germany then in the US. The is also no "the churches" in a broader sense. There is the catholic church and the evangelical church in Germany, who are protestants by name and broadly lutherans. And thats it, only those two.
Both had people involved in the GDR civil rights movement, one of the recent German presidents, Joachim Gauck was an Lutheran/Protestant pastor and an anti communist civil rights activists, who wrote the preamble of the German version of the black book of communism. He compared the UDSSR to the Hitler regime. I would be careful to call that "liberal". It was mostly conservative and has been so after the reunification.
The role of the two churches is an extremely difficult subject throughout the last century and I dont think broad generalizations help anyone here.
"Liberal" and "conservative" also have very different meanings depending on country and context, and I don't see how opposition to the Stasi or GDR government automatically makes someone a conservative. Gauck was supported by the Social Democrats and the Greens, both of which are very progressive (well to the left of US democrats).
Both had people involved in the GDR civil rights movement, one of the recent German presidents, Joachim Gauck was an Lutheran/Protestant pastor and an anti communist civil rights activists, who wrote the preamble of the German version of the black book of communism. He compared the UDSSR to the Hitler regime. I would be careful to call that "liberal". It was mostly conservative and has been so after the reunification.
The role of the two churches is an extremely difficult subject throughout the last century and I dont think broad generalizations help anyone here.