Most of the “converts” are probably not converting, but were nominal Catholics.
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Since I work with them, I can tell you that this is very true. I am happy to see that many are becoming serious about God. I have also personally seen many commit and/or re-commit themselves to Christ in their Catholic faith.
Jesus is LORD!
Common sense would say that the people joining Evangelical churches are the ones seeking a closer relationship with God, not the indifferent, just casually leaving their family’s Catholic church, to become active Evangelicals.
I haven’t found any data that supports the claim that it is the indifferent Hispanics who are seeking out a more passionate and conservative Christian church.