Posted: "If it does, why is nobody asking whether it is Israel that poses a danger to Iran." Israel does. No one asks Israel because Israel is backed by the Americans, who for some reason appointed themselves the police of the world, setting laws that only apply to nations who are not America's allies. This is the "democracy" America keeps forcing on those who do not agree with it's ways and lifestyle. And even if Israel did not have missiles that can reach Iran, it does not mean that Iran can not develope such missiles. The same reason that the USA and Israel have nuclear arms, or whatever missiles they have, Iran and any other nation have the same right to have without facing any sactions or attacks.
U.S. to defend Syrian rebels with airpower, including from Assad (Reuters)
from the article: U.S. warns Iran: Meet nuclear obligations or face 'next step'