The way I see it, someone's going to have to kick Turkey's ass someday - and if it ended up being the U.S., for the sake of the Kurdish people, we'd be getting called a turncoat and betrayer by all the NATO and EU nations for having dropped the hammer on a sorta-NATO, sorta-EU nation.
Only less American blood soaks into the desert in THIS version of events.
I really don't see any middle ground between these two options.