Well Israel won't use nuclear weapons, but the threat would (should?) be more than enough to shut Turkey up.
Israel doesn't need approval for anything. KABOOOM if need be.
I'm not expert, but seems logical.
This is the difference between Israel and Turkey... Israel absolutely would use nuclear weapons if push came to shove, whereas Turkey aren't quite so ready, it would be much more last ditch - and not many countries are going to get too pushy with Israel after they've just flattened another country with nukes really...

