This is imperial hubris. Why should the USA and its stooges alone have the monopoly on nuclear arms ? Israel has nuclear arms and there isn't a murmur of protest. Why should Iran be different ? Afterall Israel has a paymaster which has used nuclear arms twice. It need not fear a nuclear attack from Iran. It can strike back several hundred times. The real fear is the end of Israeli nuclear monopoly in the region and a brake on its expansion.
5 wounded Syrians rushed to northern Israeli hospital (Haaretz)
from the article: Report: Washington concerned Israel gearing up to attack Iran