General Pat Cleburne, CSA, the Stonewall Jackson of the West, is a Southern hero who was born in Ireland. The Poet Laureate of the Confederacy (defacto) was Father Abraham Ryan. Remember too that the O’Haras in GONE WITH THE WIND were Catholic.
As for Jews, the CSA had a Jewish Secretary of State, Judah P. Benjamin and this was decades before the USA has such an important cabinet position filled by a Jew.