A terrorist is a coward who is willing to kill defenseless people because of some grudge he has.
In Nairobi, Kenya, a coward is a member of Al Shabab walking into a shopping mall and killing unarmed men, women and children because he has a grievance with the government of those unarmed people. Ironically Al Shabab claimed that women were not part of the attackers because they shelter their women.
All over the Middle East, a coward is a member of some sub-group of a religious sect that doesn't like even the existence of a competing sect, be it Shia, Sunni, or Christian. This coward believes it is OK to drive a car bomb into a mosque or church killing dozens if not hundreds of unarmed men, women, and children.
A coward is member of a faction or a government who is willing to shell or gas an area where some opposing fighters may be. It doesn't matter if men, women, and children who are not opposing fighters are killed or injured.
A coward is a member of a government who is willing to send drones to bomb suspected terrorists regardless of how many women and children might be in the strike zone.
A coward is a member of government who is willing to send shells or missiles into a populated area to dissuade another government to not do something or other. Men, women, and children will be killed who have little or no say in what that government does.
A coward is a member of a government who is willing to send nuclear missiles to destroy a city of another government because the first government has some dispute with the second government. Again, men, women, and children will be killed who have little or no say in what the second government does.
When will they ever learn, when will they ever learn?