Religion is just a front. White Evangelicals are at the core just another of the white supremacist, nativist groups that make up the GOP coalition.
"Evangelical denominations formed from these splits in the South were usually comprised of people who had made money from slavery or supported it. After the Civil War many were more likely to have supported the Ku Klux Klan and approved of (or participated in) lynching. The burning cross of the KKK, for instance, was a symbol of white Christian supremacy, designed both to put fear into the hearts of African Americans and to highlight the supposed Christian righteousness of the terrorist act."