As stated earlier, both Southerners and Catholics were "yellow dog Democrats" back in the day (and many still are).
The Deep South was never anti-Catholic, having a semi-feudal society similar to that of medieval Europe. In fact at the time of the Civil War many Catholics had a deep affinity for the South and many in the North became Copperheads.
It was the North, inheriting traditions from Puritan New England that was anti-Catholic. Many Republicans associated Catholicism with Southern slavery and were anti-Catholic. Moreover, in the election of 1928 the Deep South went solidly for Al Smith. The only defections to the Republican party were in my own Upper South, which to a large extent is more similar to Puritan New England than the Deep South ever was.
Zionist Conspirator:
You are correct on that point that much of the artistocratic South of the pre-Civil War period was not anti Catholic. In fact, New Orleans and Louisiana were perhaps culturally and demographically the most Catholic in the U.S.
Catholic Schools back then were regarded as the best in the South and the Church had already founded many great Hospitals to take care of anyone. The feudal society and Tradition of Family, local rule and the South’s devotion to God and country was the main reason that Pope Pius was the only European to recognize the Confederacy as an independent nation, despite that fact that the Church had going back to the 15th century long ago started to reject slavery.
From having relatives living in Northern Alabama, Georgia, South Carolina, and Tennessee...I can say strictly on the basis of personal experience...
The exceptions to the rule: Louisiana, the gulf coast regions of Mississippi and Alabama, Charleston, Savannah, and about the southern 1/3 of Texas. (If you want to call the Hampton Roads southern, you can add them in as well)