Hispanic Immigrant Secularization

The New York Times has an interesting article about the secularization of Hispanic immigrants. Back home in California, I often wondered what the effects of secularization and Protestantization had on Hispanic immigrant populations. Did the Catholics resent the Protestants who had left the Catholic Church upon their arrival in the United States? Or did the Protestants convert before immigration? How did the role of Catholicism in Hispanic identity change once in America?