Fundamentalist... I believe an approximate definition would be a person who holds to absolute rigidity or unmoving devotion to their particular position...
Let someone break into your house and try to hurt or kill you or your loved ones. All of a sudden this 'live and let live' shit goes right out the window as you either prosecute the sucker in court or you lock and load with the intent to blow them away.
Anyone who would go to those lengths to protect their family is a fundamentalist in the sense of their fundamental desire to keep their personal freedom and safety in the face of danger. Would anyone dare say 'yucch' to that? I think not.
Stevangelist