Oi! Mordechai Vanunu. No, Israel has no nuclear weapons, and it needs to hide the fact that it has no nuclear weapons, which unlike Iran makes it immune from inspection, and it (mercifully unsuccessfully) advised apartheid South Africa how not to have nuclear weapons too.

USA policy is made by a few religious nutcases in Israel, Iranian policy is made by a few religious nutcases in Qom, and British policy is made in Washington. Usually by a few religious nutcases, but we've been spared a bit of that because the current top dog is only mildly nutty. And of course we've got our own homebrewed religious nutcases (see John Sentanamu).