I’m confused about how you are defining Progressivism and why you are defining it as an American heresy with bad economic ideas.
Many progressive leaders actively borrowed from European reform programs and felt that the United States needed to strengthen its social welfare safety net. They also were influenced heavily by an evolutionary understanding of society. They believed that by supporting worker’s rights and women’s rights that they could promote a more equal and harmonious society.
Theodore Roosevelt, William Jennings Bryan, and Eleanor Roosevelt all saw themselves as Progressive in various ways. Your article seems to only dissect one strand of progressivism.
Walter Rauschenbusch, Reinhold Niebuhr, and Dr. King were all heavily influenced by the Social Justice themes in the Hebrew Prophets and the Gospel of Luke. They tended to emphasize corporate as well as individual sins. I don’t see how you can define the movement as heretical without maintaining a narrow view of orthodoxy. They certainly reinterpreted the Gospel for their time and emphasized right action over right belief.
If I am reading you correctly, I wonder if you are reading the Bible through a heavily individualistic lens that would have been foreign to both Rabbinic Judaism and early Christianity.
I would appreciate your clarification on these points.