I am sure that the nukes are rigged for destruction at this moment. I assume the local commander has authority to destroy them if he fears they will be compromised.
As I understand it, these nukes are old and need to be armed with instructions from the U.S. That said, they still might be valuable as material for dirty bombs.
http://sputniknews.com/middleeast/20160730/1043792284/erdogan-turkey-purge-nato-incirlik.html
All they need is the core material. Making it work is simple.