So could this trend be fueled predominantly by some sense that the Catholic Church isn't being proactive enough in some area (whether that be opposing elements such as contraception, or simply recruiting/spreading the Good Word throughout the world)? A stat like that basically makes me think that extremists are leaving the Catholic Church to join more ideological congregations.
It's more likely fuel by the fact, that the Catholic Church are losing its de facto religious monopoly and it still need to attempt be broad enough to the entire population to keep all its faithfuls. While Protestants can grow just by delivering religious niche products. The Catholic Church could become more reactionary, but it would just mean it would lose liberal members instead.
