The UN is not welcome in Iraq:

"We have had bad experiences with the U.N. in the past," said Yonadam Kanna, a member of the Iraqi Governing Council. "There is a difference of opinion on what their role should be here."

Yeah, I'd say they've had bad experiences, such as Saddam killing and raping while the UN dawdled.

"There is a track record that shows the U.N. is not efficient in these things," Mr. Qanbar said. "We cannot have anyone overseeing or managing this Iraqi process from outside Iraq."

Even a country that is in it's democratic infancy can see that the UN is a sham, why can't Kerry?