They are more vocal because they are dying out.
There are a number of organizations whose main goal is to destroy the Church. What better way to make themselves look like they are part of the mainstream when they cloak themselves so as to deceive. This is not just a tactic to discredit Catholicism, but all denominations have individuals who use cloaking techniques intended to deceive.
Somewhere in the Bible there is a description of this technique: "Those who say they are Jews, are not, but do lie." Revelation, I think.
You can tell I am Catholic because I know it is in the Bible but I can't quote the verse.
You can find the chapter and verse if you do your research. No one can do that for you!