I sure hope not, but I fear that some of them did.
After all, at one time there were anti-miscegenation laws in, what was then all 48 states. Even as late as 1967, when the Supreme Court ruled them to be unconstitutional, there were still something like 28 states where these laws were being enforced (it wasn't until 2000 that the last ones were officially removed from the books of some states).
In the 1967 Supreme Court case, 'Loving v. Virginia', the Virgina trial judge at the criminal prosecution of Richard and Mildred Loving, a mixed-race couple, had sited the Bible and other religious texts as the basis for his view that they were criminals not only under Virginia law but God's law as well, when he wrote in his final ruling that:
"Almighty God created the races white, black, yellow, malay and red, and he placed them on separate continents. And but for the interference with his arrangement there would be no cause for such marriages. The fact that he separated the races shows that he did not intend for the races to mix."
I'm afraid that there were many members of the Klan who held similar beliefs that they were somehow doing God's will. That is what makes them dangerous, not that the religion they've chosen to believe actually advocates those positions, but that they BELIEVE that it does and therefore they are justified in whatever actions they take to that end.

OCU