The problem with all your reasons for this and that, is that it is an almost perfect record of voting against the republicans for 150 years, not just recently, or because of unions, or whatever, and we know that it will always remain that way, we can predict the Catholic vote of the future, today, it is what the left bases a future without conservatism on.
Voting for Clinton, Clinton, Al Gore, Obama, Obama, wasn’t because they and their party’s platform were more socially conservative.
We can educate conservatives and pro-lifers, and the many Catholics here on the truth of the Catholic vote, and what Catholic immigration means in regards to saving the lives of the unborn and preserving conservatism in America if that is our goal.
It wasn't because they were Catholic, either.
150 years? Well, that flanges up with what I said, doesn't it?
If you want to get the GOP more votes, dismissing demographics isn't the way to go about it. Understand the underlying problems and there might be a solution. Fail to do so and you only guarantee failure.
Perhaps that might be more successful than painting all Catholics (including Conservative Republican Catholics) with a millions wide brush because some are (at some point) liberal or side with those who side with liberals.
Dismissing the secular factors in the voting habits of a demographic (actually, a few demographics) makes as much sense as writing off the Women's vote because there are a lot of Liberal Women out there. You are concentrating on the wrong factor, it is that they are Liberal or Democrat that is the problem, not that they happen to be Catholic.