Could make the same argument for Nazi's and White Supremacists frankly Slade.
They /believe/ they are doing what's best for the nation, for their people, etc... You or I disagreeing with that belief isn't a deciding factor on individual morality. You're playing /your/ agenda, /your/ beliefs, except this is America and our Constitution defends those ***** rights to believe and even say as they wish.
Most modern Nazi's and white supremacists don't kill people, some fringe activists take it too far. See how that shit works? It sucks sometimes, but that's the way it is when you have real freedom.