When a country goes to war to protect it's inhabitants, for national security, it is not "living by the sword".
A country that oppresses it's own people, like Iraq does, (killing and torturing and starving their own people, and ethnic cleansing, etc.)and attacks other countries, and hides behind terrorists, that is a country that lives by the sword.
Ecc 3:3 A time to kill, and a time to heal; a time to break down, and a time to build up;
Ecc 3:8 A time to love, and a time to hate; a time of war, and a time of peace.
As you can see in Ecclesiastes, that there is a time to kill, and a time of war. Neither killing, nor war are wrong things to do of themselves. God sanctioned both many times throughout Israel's history. They have a purpose in this sin filled world.
When a nation is ruled by a murdurous regime, and the people of the country are oppressed and killed by the thousands, and they support terrorists, who exist to kill innocent men, women, and children, especially Americans and Israelis, then it is OK to put a stop to it.
If you saw a man attempting to rape a woman, would you not attempt to stop him, even kill him. I would. I would use whatever force necessary to stop him, even if I didn't even know the woman personally.
No different with Saddam. He is the murderer/rapist of his own people and people abroad. He is EVIL. America is NOT. America may not be perfect, but it is not Evil.
America has a special purpose and plan in God's prophetic timetable. God will always remember the worshippers that came over on the Mayflower, and dedicated themselves, their offspring, and the land to God's service. He will not forget them, nor the millions of worshippers in America, this day, who faithfully witness of Him, here and abroad, or fund the gospel, and the feeding of the poor.
Meanwhile, can you name all the wonderful things that Iraq has done for their people and those abroad?