White racists of that era were almost invariably "Christian" - or professed to be Christian.
"Revisiting the preacher who used Christianity to revive the Ku Klux Klan"
https://www.sltrib.com/news/nation-world/2018/04/10/revisiting-the-preacher-who-used-christianity-to-revive-the-ku-klux-klan/
Excerpt: "Restricting membership to white Christians, the Klan wore white robes to symbolize “purity,” burned crosses to signify “the Light of Christ” and picked selective scriptures from the Bible to preach white supremacy. The Invisible Empire’s comeback was aided by Hollywood’s first blockbuster, D.W. Griffith’s “The Birth of a Nation,” which glamorized the Klan. By the early 1920s, the Klan boasted 5 million members across the country and had infiltrated thousands of churches with its hateful doctrines. Many ministers in Protestant denominations would openly declare their membership in the Klan. And creepy photos would capture Klan members in white hoods standing in churches and sitting in choir pews."
For more information, google "the ku klux klan and christianity".
You might also "enjoy" my informative blog post:
Episcopal Bishop Of DC "Outraged' That Trump Hosted A Photo-Op At Her Church: "Sacrilege"https://paxonbothhouses.blogspot.com/2020/06/episcopal-bishop-of-dc-outraged-after.html
