Are the Kurds Fomenting Civil War?

They could be. The Kurds are the most likely of the three groups to be baldly playing the Iraqi government game until such a time as they are able to declare independence. Sounds like they don't feel like that's too far down the road.

You've got Kurdish political parties picking up the salaries of probably-corrupt policemen that the central government has fired, families missing in tangles of Kurdish detention centers, American civil authorities crying foul and American military officials essentially asking, "What are we supposed to do when even the good guys are bad guys?"