The cultural conservatism helped keep the culture preserved, and alive.
During his first term, President Truman was fairly noncommittal to both sides of the debate and refused to give in to many of the demands of the leaders of the unions.
Judaism emphasized the importance of law and insisted that people were equal under the law. I'm not super sure about Christianity.
A main objective of the progressive movement was to try to eliminate problems caused by industrialization. Because of all of the pollution and deforestation they wanted to try to preserve nature.
Many people in the South of the United States opposed tariffs because they would have disproportionately affected agricultural business--which was at the heart of the Southern economy.