Actually the French fully believed there were WMD in Iraq. They didn't believe Iraq had nuclear capability, but they did believe Saddam had biological and chemical weapons. They (apparently) were as wrong about this as the US.Re/Max Griz wrote: The French said there were no WMDs in Iraq. The French were correct.
Where France differed is that they wanted a diplomatic solution - more specifically, they wanted a consensus decision, and not to be bullied into a war. whether they were right not to support the war is open to debate, depending on the long term impact of the war and Saddam ouster.
If Bush had been a better diplomat he probably could have gotten France and Germany to support the war. Of course if France, Germany and Russia had fully supported going to war it might not have been necessary - Saddam might have allowed inspectors back into the country, or resigned (doubtful). It is clear that without the dire threat of war Saddam would never have let inspectors back into the country, and UN Sanctions have been proven totally corrupt and ineffective, as they had the impact of increasing Saddam's wealth and resources at the expense of the people of Iraq.
In retrospect you have to wonder why Saddam kicked the inspectors out of Iraq. He (apparently) had nothing to hide when he kicked them out. Was he considering re-starting his WMD programs? Were the inspectors asking for or refusing to pay bribes? Did he think kicking the inspectors out and showing that the UN was ineffective would restore Iraq and himself as a leader in the Arab world? From a global historical perspective the question of why Saddam acted as he did is much more important than why Bush did what he did.