True, but from experience with family and former friends it's a prevalent trend with radicals (left, right, religious). It's not something I'd look forward to.

I guess it depends in exactly what they believe and how they think it should be achieved, since I've met people who were extreme in their positions, but capable of accepting others and staunch critics of their side.

Thinking about it, I guess the main difference with these two guys was that they didn't preach and were old as hell. Probably age earned wisdom, who knows.