Link Between Iraq Violence and Troop Withdrawals Is Considered(?!)

The link is considered!?

Link Between Iraq Violence and Troop Withdrawals Is Considered

And WTF is Pete Mansoor talking about?:

"If Sunnis and Shiites continue to work through their differences politically, Iraq will survive. If not, there is no way it will hold together," said retired Col. Pete Mansoor, who served as a senior aide to the top commander in Iraq in 2007 and 2008.

Continue to work through their differences?! Pardon me, but exactly when did they start to?