A proper reaction to secularism will prevail; an extreme or misguided one will lead to chaos.
There probably are overreacters everywhere, to everything, but I don't think they're anywhere near as significant as these articles make them sound. I live in the South, where they might be expected to be concentrated, and I'd never heard of them before. I would suspect that most of them keep away from secular society all together and probably belong to some fairly clannish little groups that do not actually engage in politics, or have very little following if they do.
But it's a useful concept for the left to use to attack religious people. It's like saying everybody opposed to abortion is a would-be Eric Rudolph.
Excellent link; thank you!