If there is time, I recommend a book about this very scenario unfolding. Your literature is well recieved in the community, and this is one good way to put that scenario out there.
I’m just trying to shine my little imaginary light forward into the future. I hope some people get spurred to action by my novels. Or for the short course, just read my CW2 cube. Google “Bracken CW2 Cube” to find it.
Israel hits Iran...Iran retaliates with whatever it can, as do other mid-east countries all around israel, accepting Jordan. MAssive conventional warfare...does the US help Israel at this point? We should, but under Obama, do we?
Pakistan enters the fray...potentially using a few of its nukes against Israel, which uses its defenses to thwart most of them, but one may get through. What then for Israel?
India attack Pakistan and the two go through their exchanges. India would probably come out on top...but at great cost.
Does China enter in at this stage? Certainly possible. Does Russia make a grab? Also possible.
If either do, it will be hard for the US not to get involved nuclearly, at least tactically at first.
As Travis says, the genie will be out of the bottle.