In the last decades, the SBC and other Evangelicals have adopted the doctrines of extreme authoritarianism and extreme female submission.
There was always some teaching of women as followers, but the extreme view of subordination was codified in the Baptist Faith and Message statement passed at the denomination's meeting in 2000. Jimmy Carter gave the adoption of this view as his reason for leaving the SBC.
The view that the teachings of the minister and the elders (no longer chosen by the congregation but appointed by the minister) is new and directly contradicts the SBC teaching I learned growing up in the SBC in the 40s and the 50s. At that time the SBC taught 'the priesthood of all believers.' We constantly heard 'there's just God, the Bible, and me; I don't need a priest or pope to tell me what to believe.'
These 2 radical teachings have created/are creating a large goup of people opposed to the equality of woman and searching for a confident, self-assured authoritarian leader. They help account for the 80% Evangelical support of Trump and denigration of Clinton.