" Israel has several hundred atomic weapons, and the means to deliver them to the target. "
The problem is that I disagree with the rest- it will be a nation like Iran, or North Korea, that thinks it can use a WMD on its enemies and get away with it. ( Yes, I know that they would have to be crazy, but they are)
This will cause retaliation, and then further retaliation ( as China realizes that it no longer has access to oil from the Middle East, or Russia decides to settle a few more accounts [after all, the US did nothing in Georgia, why should it react to a bomb on Chechnya?])
NO ONE will want it to become world-wide- but look at 1914 and tell me that nations will not miscalculate the reactions of other nations.
The US HAS gone to the UN, and the US HAS allowed the EU to negotiate with Iran- Care to show me the results that would justify the risk that has now increased from 15 years away from a nuclear bomb to one year away?