Catholics are naturally zesty, and full of life; for Italians, as one example, tomato sauce and various seasonings run in our veins. Protestants come from cold places, where scraping the permafrost to grab at various root plants is the primary pastime, and hard work is the only value--there is no place for art in such societies.
Must be recently evolved veins, since tomato sauce didnt exist in Italy until the last 500 or so years.
But yes, cold weather places arent exactly known for their cuisines since you're stuck with meat, potatoes, and pickled whatever most of the year.
Also, I suspect that the southern European trade routes allowed them to diversify their flavors more than the north.
Is that why the Southern U.S has a richer culinary tradition than the Northern U.S?