Kurds are a huge problem to Turkey and have conducted numerous terrorist acts against Turkey. Military operations involving both do occur.
The Kurds need to stick to their damn Iraqi side of the border and let Turkey be or risk losing everything they have worked so hard for.
P80, the situation is not as clear cut as we would like it to be. Kurds aren't always the 100% reliable buddies we'd try to think of them as. One of the reasons why Kurds are really softening up to the Americans right now is they need the support... protection against Turkey in fact.
I really really wished there could be some kind of compromise where Kurds will be left untouched on the Iraqi side of the border and be able to create a life there in exchange for making peace with Turkey.