Apparently the biggest threat in the world is the fact that Iran might be acquiring nuclear weapons. It is a fact of life that those with something which gives them power can think of dozens of reasons as to why others should not be allowed to get that thing which gives power. There are also, it seems, dozens of reasons as to why those with the thing that gives power should not divest themselves of the thing which gives power.
In Israel as part of his USA domestic vote raising circuit, presidential candidate Mr Romney found common cause with Mr Netanyahu in agreeing that the biggest threat to world peace is t.he prospect of Iran getting a nuclear bomb, which is the same device that Israel and the United States have. Apparently this weapon of mass destruction is safe in the hands of chaps like Netanyahu and Romney, Putin and Cameron, Ollande, and the leaders for the time being of Pakistan, India and possibly North Korea, but not in the hands of Iran.
It is a logic that I do not follow, although the rationale is clear: keep your enemies weak by any means available to you.
Nuclear weapons are the genie that cannot go back into the bottle, when the bottle is opened. It is important to prevent the proliferation of nuclear weapons. A good start will be for those in the nuclear club to put their weapons of mass destruction beyond reach.