The recent hostage crisis with Iran I think proved perfectly my point about Iran. Thankfully Iran is now deciding to see sense. Hopefully it will co-operate now with the UN over its uranium nerichment programme and allow UN inspectors to moniter it to make sure it is not being used to produce nuclear weapons.

Why is the USA allowed to enrich uranium and Iran not? Is it fair?

I think nobody should be allowed to enrich uranium for weapons, neither Iran, nor the USA, nor any other country. I also think the USA should get rid of ALL nuclear weapons, as a role model.

Lots of countries with lots of nukes = MAD (Mutually Assured Destruction)

By the way there is the nuclear non proliferation treaty which was signed by many countries several years ago to work for the eventual abolition of nuclear weapons. All America is doing to trying to enforce this agreement in its tough stance against Iran which is a signatory to the nuclear non proliferation treaty.

But US did nothing to impose restrictions on Israel, a country in a high risk zone. Of course Israel won't use these bombs on westerners.

Also US supply NATO bases around Europe with nukes. How does this rhyme with:
The Treaty on the Non-Proliferation of Nuclear Weapons, also referred to as the Nuclear Non-Proliferation Treaty (NPT), obligates the five acknowledged nuclear-weapon states (the United States, Russian Federation, United Kingdom, France, and China) not to transfer nuclear weapons, other nuclear explosive devices, or their technology to any non-nuclear-weapon state.

has no one here ever heard of mad(mutual assured destruction)it's basically means in the event of all out nuke war both enemys would be fucked.whether or not this policy still stands is open to debate.