Bravo on this comment. There was much said in this statement. If anything is serious and imminent it is the threat of your home not being secure or your way of life not being safe or sound. Albeight attacks on your homeland or political ideology that hinders relations if not with your country but for the common good. (Pol Pot, Hitler, Hussein, et cetera)

This usually happens in political theory or the actual threat of violence. Hence; The Revolutionary war, The US Civil war, Pearl Harbor and 9/11. If you had notice before many of the war and conflicts many negiotations had taken place. Or where we had allowed ourselves to be slapped in the face nurmerous times.

And with terrorists one should never negotiate. Even US Police Swat teams have diplomatic measures to take. One if not heard often enough is to never negotiate. Give the enemy the idea they are in control or enough rope to hang themselves.