One of the things I appreciate about Barth is that while he did make political moves (Barmen et al), unlike modern hipster Christians, he really isn’t interested in showing how every page in the Bible teaches left-wing socialism. In either section 19 or 20 of Church Dogmatics it appears that he makes a veiled reference to the difficulty that many European Christians had in evaluating Nazism and Communism. That he resisted Nazism is obvious. However, and unlike Americans today whether right-wing or left-wing, it seems that he realized the true danger to humanity was not Nazism as such, but communism. He addresses those who perhaps want the church to ally itself with National Socialism in order to resist communism. He says that is wrong, and I agree with him, but he does so from a position of understanding.
What we don’t realize is that communism killed hundreds of millions more than Nazism.