Answer
To follow what Catholicism preaches to their spiritual and worldly life
Jewish/Jew Catholicism is the religion not the term for people who follow it. Catholics follow Catholicism. Like Christians follow Christianity. Jews follow Judaism.
actually, their present religion is Roman Catholicism...
Catholicism
Christianity (Catholicism)
I do not know what you mean by "universalizing" or "ethnic". However Christianity (which includes the Catholicism) is for all people.
For the most part, Catholicism...
Catholicism
Because it is the truth
Generally Catholicism.
Probably like most of Mexico, Roman Catholicism. The indigenous people have mixed Catholicism with their traditional indigenous religions.
Catholicism
Roman Catholicism.