The Southern slave holders gave their enslaved people a Bible that told them to be good slaves and their reward was on the other side- how convenient.
The same slave holders broke from the Union to protect their right to enslave and traffick people, and after they lost, they used the same flag almost 100 years later when the Civil Rights Movement was starting.
In between, some of them sold everything (but their enslaved hostages) and ran to the northern-most state of Mexico to buy really cheap land, and enslave more people to work it. The Mexican Government didn’t want slavery (any more) and those good Southern folk fought to overthrow their new government and begged the US (which they voluntarily left) to take them back. When they were a Republic, it took an act of the Texas Congress to allow a freed Black person to stay in the Republic. Then America took them back (along with the land), only to have those same folks side with the rest of the South over, you guessed it, Slavery.
After Brown v Board of Ed, those exclusive Christian Academies became the place White people in North Carolina sent their kids, while the Governor was given the power to close ANY school that was in danger of being integrated. Tuition was reimbursed by the state and charter schools became the rage there.
Yes, indeed. It has always supported racism and sexism. It always confused me how any minority church could call itself part of the SBC. Even that split started several years ago, without an ounce of irony, but then again, there are still plenty of segregated cemeteries, and not just in the South.