The wider experience of 160 years of history and with what happens to Hispanics and other minorities is more revealing.
Add to this list: later immigrants to the large cities and lower classes of the time, e.g. the Irish.
We have 160 years of almost perfect democrat voting by the Catholics, including for Obama, and this is as good as it gets, we just witnessed the best voting in Catholic history from 1972 to 2012, it is returning to it’s normal place in history.
The explanation is these threads.
The entire interest of what are supposed to be conservative Catholics, is to fight tooth and nail to deny that Catholics even vote democrat, no one seems interested in fixing it, or saving America from their voting.