It's untenable. And thus it will never happen.
I don't think the latter conclusion necessarily follows the former one.
Then Israel is in deep sh*t.
People outside of Israel have been saying that since it's birth. Many of them hoping for it, some of them actively working towards it. Israel has done just fine, great even. Yeah, their future might not be as secure as the US or, say, Japan, but one could fairly easy make the argument that they are the most secure country within 1500 miles of Tel Aviv (except Italy).
(I'm not saying one can't make good arguments for other countries being more secure, one certainly can....Turkey ain't going anywhere for example)