Why is Israel allowed nuclear power and Iran denied access to this technology?
Well duh. Israel, India and Pakistan all refused to sign the Nuclear Non-proliferation Treaty. As a result, they had to develop nuclear power on their own. As a result, there was no issue with them also developing nuclear bombs. Iran and most of the other nations signed the Nuclear Non-proliferation Treaty. As a result, they got help in developing peaceful nuclear power. As a result, they gave up any right to develop nuclear bombs. Iran signed the treaty yet is developing nuclear bombs. They are in violation of the treaty and as a result, the rest of the world can enforce the treaty. If you can not understand any part of the above, READ THE TREATY!!!
