"What do you make of this, folks"?
"When the Klan was formed, there were no Southern Republicans, to form anything."
Actually, that is wrong. The Klan was formed to drive Southern Republicans out of power during Reconstruction. For the first ten to twenty years after the Civil War the southern state legislatures were dominated by Republicans -- who represented the faction of the south that stayed loyal to the Union, for the most part.
The Klan's initial purpose was to drive these -- as they viewed them -- traitors out of power. That this also involved disenfranchising blacks was viewed as a feature, not a bug.
The Klan succeded so well that many 20th-Century southerners never realized that there had been a southern wing of the Republican Party. But when the Klan started, there was, and it was the mortal enemy of the Klan.