Why are the French & Germans being unilateralist?

Interesting theory from USS Clueless:

Suppose we (the UK and US) do ignore all the pressure and last-minute
finagling and do actually attack Iraq, which I think now is virtually
certain.

Suppose we win, which is absolutely certain.

And suppose, once we've done so, and have occupied Iraq and have full
(really full, not UN full) access to Iraq's records and can truly find
what they have, that we find that everything we've been saying about
their WMDs is really true; that they have chem and bio weapons and
banned delivery systems, and are near to developing nukes, which I also
think is extremely likely.

One more and the most important: suppose that the records also show that
during the 1990's companies in France or Germany (or both) actively and
deliberately broke the sanctions and sold equipment and supplies to Iraq
which helped it to create these things, and that the governments of
Germany and France knew and approved of this and actively helped.

If they (Chirac and Schröder) know that they face the scenario I
described above after we invade, that would definitely explain their
behavior, because preventing Anglo-American occupation of Iraq is the
only conceivable way they could prevent it. If this is the case, then
since no other way exists to avoid this fate and since the consequences
of it are dreadful, it would make sense to continue the lost cause of
trying to prevent our attack.

So the more they persist even as it becomes ever more hopeless, the more
I find myself worrying that they are trying to cover up something
really, really big.

I do hope I'm wrong, though.