The foreign minister, a member of a government brought into being as a result of the invasion, was a senior Kurdish official during the 1990s.
In 1988 Saddam attacked the Kurds in northern Iraq using chemical weapons.
Mr Zebari told the BBC: "As Iraqis who have gone through the suffering and the agony of Saddam Hussein's regime, we support Tony Blair's statement.
"I believe it was worth it. I believe Saddam Hussein's regime was an affront to the international community, to the international consciousness because of the atrocities, the crimes, he has committed."
But Mr Blix disagreed, saying he believed Mr Blair's statement had a "strong impression of a lack of sincerity".
"The war was sold on the weapons of mass destruction, and now you feel, or hear that it was only a question of deployment of arguments, as he said, it sounds a bit like a fig leaf that was held up, and if the fig leaf had not been there, then they would have tried to put another fig leaf there."
Mr Blix added that the weapon inspectors were "pretty close" to showing that after 700 inspections, that there were no WMDs.
'Moral high ground'
Conservative MP Richard Ottoway, a member of Parliament's Intelligence and Security Committee, said Mr Blair's comments were a "cynical ploy to soften up public opinion" before his appearance at the Iraq Inquiry.
Reg Keys: "I think he's trying to soften his approach to make himself look less guilty"
Mr Ottoway added that Mr Blair had misled parliament on "more than one occasion" and that people would be "dismayed" that what was the "most significant foreign affairs initiative since World War II had been debated on a false premise".
He added that some MPs may had made a different decision had they known the "full unvarnished truth".
Former Liberal Democrat leader Sir Menzies Campbell agreed, saying he would have failed to obtain the support of the Commons.
Reg Keys, the father of a British soldier killed in Iraq in 2003, said he was "absolutely flabbergasted" at Mr Blair's statement and he thought Mr Blair was trying to "struggling to find some moral high ground in order to justify the total farce of the Iraq invasion".
And Carol Turner of the Stop the War Coalition said it was "extraordinary" that Mr Blair was admitting that he was prepared to tailor his arguments to fit the circumstances.
"It's not a matter of applauding his honesty now; it's a matter of attacking his lack of honesty and integrity in the circumstances."
Mr Blair is set to be the key witness to the Iraq inquiry, which is looking at the whole build-up to the war and its conduct and aftermath.
Fern Britton Meets... Tony Blair is on BBC One on Sunday at 1000 GMT.
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