Saddam needs to be taken out, and it's quite reasonable to say that diplomacy did not work. UN weapons inspectors have been in Iraq for a few years since the Persian Gulf War. Did they accomplish what they were sent for? No, because Saddam would not allow them to. Saddam Hussein has continually disregarded UN demands to disarm, and has not done so. With Saddam in power, Iraq poses a very real threat to world stability.
Now as to war: While I do agree that Saddam should be deposed, the idea of starting a full-on strike on Iraq does not sit well with me. However, I do agree that we should do whatever is deemed necessary.