Its certainly probably that Iran doesn't want nukes in order to use them against Israel. But that doesn't mean you get to discount their rhetoric about destroying Israel, and the fact that such rhetoric aligns horrifically neatly with the notion of a nuclear Iran.

Still, the prospect of an Iran that is powerful on the world stage and the inevitable proliferation that will result probably increases the chances that someone crazy enough to nuke an Israeli city will get ahold of enough material to do so exponentially.

So this doesn't make it inevitable, just a hell of a lot more likely.