What psychotic people!
I guess that you could say that this movie shows what goes on inside the mind of a terrorist. They believe in their cause to the point where they are willing to kill for it and are proud to die for it.
No matter where someone stand on the issue they would be disturbed by some of the people's actions and ideas: the websites with the doctors names and addresses, the glint of pride and happiness in Paul Hill's eyes when he talks about the murders he committed, and how happy he would be to die for god.