US troops clash with 'PKK rebels'

iraq > turkey > big mess

I guess that this has something to do with some deal surrounding Turkey's decision to not send troops to Iraq after all, after some (fortunate for the whole world) second thoughts the American administration had on the issue, as well as Turkish fears and popular opposition to the plan.
That Turkey isn't sending troops to Iraq: good for all involved.
That the US has now targeted a major Kurdish militant group (hardly different in its aspirations than Barzani's and Talabani's parties): bad, serious trouble ahead for all involved, and especially bad news for the Kurds.