WMDs: Do they matter?
In some contexts, no. Instapundit has more. Specifically, scroll down to the letter from Major Diggs Cleveland, who has just taken my breath away.

I say that one only needs to look into a mass grave, filled with the bones of children scattered among dolls and toys, to know that this war was necessary.

If you are not prepared to accept that, then don't bother reading the rest of the post. Nothing the Major, the Professor, or I can say is likely to persuade you.