Israel neither acknowledges nor denies that it has nuclear weapons. Israel is generally regarded as a de facto nuclear weapon state.
It seems to me that something has to be done about Israel’s nukes too, otherwise they will keep blackmailing us into defending them. The fact that Israel has nukes destabilizes the reigon. It makes us look like hypocrites for going after Iraq. It hurts our credibility with Arab states and Arab people. It makes it harder for Arab states to take a moderate line with Israel. It is a big problem, and its one that is difficult to talk about as long as the polite fiction continues.