If you are referring to the situation right now, I think MAD doctrine is seriously compromised. I also doubt that the Jarrett puppet in the White Hut would ever push the button, unless it was to defend Mecca or Tehran against Joos.
The Israelis are perfectly capable of providing their own, in house, nuclear deterrant.
And I’m guessing that, given their strategic situation, they lean a lot more towards counter-value in their planning.