Its not surprising that a Catholic church and its parishioners in the south would adopt some protestant practices. The South is the most protestant area of the country, and also the area of the country with the highest church attendance.
You’ll see this in other parts of the world too, there are cultural differences reflected during masses in places like Africa and Latin America compared to the US or Europe.
Similarly, here in America, eastern rite Catholics complain sometimes about “latinizations” from the dominant Roman Catholic culture in working class areas, picked up from their Latin Rite friends and relatives.
I understand the culture shock, I understand your concern, I don’t know how anything could be done about it.
The trend since Vatican II seems to be to allow each bishop as much discretion as possible. There were 16 documents of the council, but a big theme was the role of each bishop.
We then had a bishop who turned around and delegated most of his authority to the pastors of each parish. So, there was and still is a lot of non-standard practice in my diocese. My current pastor is a priest who is trained in canon law, but adds prayers and songs to the liturgy, as if we didn’t sing enough already.
We have two churches in our parish, and they have long used The People’s Mass Book and the Worship Hymnal, both of which seem to have a certain amount of Protestant hymns by Martin Luther, Charles Wesley, etc.
The rationalization for Protestant hymns is that “we’re taking the best” of the Protestant tradition. I am old enough to have lived through Vat II, and I was hoping for an explosion of high quality music, a la breaking the floodgates open to stimulate and incorporate a whole new involvement with the liturgy of the Mass, but I don’t see that anything like that has happened. On the contrary, clericalism simply had a new domain to conquer, and that is where we are today. I think the priests pick the music that they are most comfortable with, that puts them in the mood that they want for Mass, and that’s it.
We sing THE SAME Kyrie, Gloria, Sanctus, and Agnus Dei (in English, of course), year in and year out. No longer singing the Credo. The priests use the SHORTEST Eucharistic prayer – the one where the priest prays something like “may your Presence come upon these gifts as the dewfall” – Is God’s presence in the Eucharist like a “dewfall” anyway? something ON TOP OF the bread, like dew is on top of grass? I always trip mentally when I hear those words. If they had to include a simile in the prayer, I don’t think that was the best one to use. Am I still on the topic of this thread?