Boot Turkey out of NATO, then give full support to the Kurds, and make it known through back channels that we will not get in Russia’s way should they put Turkey in it’s place.
I’d suggest cooperation between the US, Russia, the Kurds, the Armenians and the Greeks.
But we both need to hit Turkey, and then Iran. Then we will close in on ISIS from two sides in Iraq. I hate having to do this, but Islamic aggression must be dealt with now, not later.