Yes the nations of the world do discriminate. So do people. As you yourslef pointed out Iran is a "dark regime" in your opinion. Israel has its flaws but its no doubt sizeable nuclear arsenal exists merely to puff Israel up and make it look stronger than it is. In other words its a deterrant. Iran's nuclear weapon is no doubt a deterrant as well aginst exteranl regime change. However the daily threats and insinuations from Iran and its lack of a democratic process makes the world jittery about Iran's potential use of such a weapon. When it comes to Israel the world knows its nuclear arsenal is a weapon of last resort. That is the difference.
Obama says world must reach climate deal in Paris 'while we still can' (Reuters)
from the article: What Israel can learn from Iran