Thats part of my point though. People will argue that Iran has made threats to wipe out Israel, therefore they shouldnt have nukes. While I dont think nuclear proliferation in general is a great idea, its really hard to justify telling other nations no when its clear nukes are effective deterrents. And like you said, what right do we (the US) have to tell others not to obtain nukes when we are the only country to have actually murdered a fuck ton of people with them?