(Crazy) People willing to commit violent acts for the purpose of a political show (Otherwise known as terrorists) live in America, too. And they aren't all religious, and they don't all look so different from "us."
I'm glad we come down hard on them too, even if some of their stuff doesn't seem as violent as a car bomb, both because we need to keep ourselves safe here, and because we need to keep our own yard clean. Every time a "homegrown" terrorist does something (even a small thing) in America, it helps create an propaganda atmosphere that promotes terrorism as a legitimate political tool.
In my opinion, using the political tatic of terrorism (causing fear in a target population for a political/ideological purpose, read this for more of my thoughts on the nature of terrorism) is almost (though not quite) as the violence that usually results. The violence isn't really the point of the terrorism; it's a tool used to cause people to feel fear and then give in to whatever political cause the terrorist believes. Anyone willing to use this tactic has completely discredited themselves, and having one of them on your side actaully weakens your position (in my opinion). So, the good cause of environmentalism is degraded by these idiots who think it's ok to start fires for the good of Mother Nature!
In America, we need to find and stop these fools so that we can have a legitimate political sphere (which we do, for the most part) and also so that we can be an example to other democracies and countries where violence is an acceptable part of the political process (Russia). It may seem like a small thing, but I think it's important.
Oh, and yeah, I'm back.