So many? Who? I didn't see many at all saying Saddam was dead.
There were hundreds of posts claiming that we got him in the decapitation attack prior the start of ground action. Then again when we bombed that Baghdad suburb.
I saw quite a few. I found these with a 5 minute search. Some folks base comments on evidence of the moment, but some are pollyanna's who think we have to discount contrary information just like the Democrats do.