Bush is wrong: Iraq is not Vietnam
"There is a good reason for the difference. The Vietnamese communists had organised and operated a countryside politico-military organisation with branches in almost every village. The North Vietnamese People's Army resembled that of an organised Western state. It conscripted recruits throughout the country, trained, organised and equipped them.
The Iraqi insurgency, by contrast, is an informal undertaking by a coalition of religious and ex-Ba'athist groups. It has no high command or bureaucracy resembling the disciplined Marxist structures of North Vietnam. It has some support from like-minded groups in neighbouring countries, but nothing to compare with the North Vietnamese international network, which was supported by China and the Soviet Union and imported arms and munitions from both those countries on a large scale.
North Vietnam was, moreover, a sovereign state, supported explicitly by all other communist countries and by many sympathetic regimes in the Third World. The Iraqi insurgency has sympathisers, but they enjoy no organised system of support and are actively opposed by many of their neighbours and Muslim co-religionists.
The recent upsurge of violence in Iraq in no way resembles the Tet offensive. At Tet, the Vietnamese new year, the North Vietnamese People's Army simultaneously attacked 40 cities and towns in South Vietnam, using 84,000 troops. Of those, the communists lost 45,000 killed. No such losses have been recorded in Iraq at any place or any time. The Tet offensive proved to be a military disaster for the Vietnamese communists. It left them scarcely able to keep up their long-running, low-level war against the South Vietnamese government and the American army."