Difference #2 between Iraq and Vietnam

I would like to clarify point #2 in the differences between Iraq and Vietnam:

The government of Iraq had been hostile to the United States for more than 10 years before the U.S. toppled its government. President Clinton went out of his way to avoid war. The U.S. bombings in Iraq during his administration were the result of radar locks on U.S. aircraft by Iraqi forces. The peace treaty signed in 1991 specified this as an act of war. This is thought of as being the same thing as shooting a missile at an airplane.

Vietnam in contrast, involved the United States armed forces to support its government, not topple it. The U.S. had been involved in South Vietnamese domestic activity well before the escalation in 1965. In Iraq, the U.S. did not become involved in domestic activity until after Saddam had been toppled from power. Then it became a matter of establishing a different government.

Many people believe that the war in Iraq is a domestic issue. This is undoubtedly true, although many other factors are of major impact as well.