I was in US and I never heard of 30 bury grounds of 10000+ people. I did know there are Iraqi celebrating when US troop got in, but only a few hundred and all of them are recruited by US. US people were fooled as well until much later. It is just like that Jessica case and the nurse accusing Iraqi government murdering Kuwati infants (in the first Iraqi war). Turned out they are all bogus stories designed by US official to fool the public and US media are willing participants.
I still remembered when US government declared there is no WMD and 42% of US people still believed there is. Why?