US and UK hypocrisy on Iran and its nuclear program

I've just wriiten to my MP Labour's Kerry McCarthy on the issue of Iran and its nuclear program. I've copied the letter below:

Dear Kerry McCarthy MP,
I feel that the UK must pledge itself to ensuring that what has happened in Iraq doesn't repeat itself with Iran and would like to know what your view is on this issue. Do you feel, as I do, that we must look hard for non-violent solutions to conflict situations, which take into account the interests of all parties as well as future generations in order to achieve lasting settlements?

Amidst the escalating rhetoric on Iran, its nuclear program in particular, there are some key facts:
Iran is a signatory to the Nuclear Non-Proliferation Treaty and hasn't yet violated it. There are unresolved issues around full transparency of course but Iran's nuclear programme, including uranium enrichment, is perfectly legal under NPT requirements for non-nuclear states.

I believe along with fellow Greens that this encouragement of the spread of nuclear technology and nuclear power is a huge weakness of the NPT, but the fact remains that it is the operative legal framework.

Its my view that we are seeing extraordinary hypocrisy and double standards on the Iran issue. While the US accepts Israel's unacknowledged nuclear arsenal, and even rewards India's nuclear weapons status, it threatens war against Iran and fails in its own obligations to disarm under the NPT Treaty.

Our government is also guilty, apparently fighting wars to stop others gaining nuclear weapons while continuing to upgrade and refine our own. What moral authority can we possibly have to lecture Iran or anyone else about not developing nuclear weapons when we refuse to begin the process of disarmament ourselves, and indeed have decided to replace our own nuclear weapons arsenal even as the process of consultation on Trident is underway?

Have we forgotten the very real nuclear weapons are right here on our own doorstep, in Aldermaston, Fairford and Faslane. Will you please let me know how you view these facts and arguments?

The replacement of Trident is illegal, immoral, and hugely costly. It is dangerous, counterproductive, and places Britain at even greater risk of attack. Plans to replace Trident, together with the threat of first use of nuclear weapons, made by a Labour defence minister, risks making Britain itself a rogue state. The best policy on Iran is not to threaten attack but to engage with its people and its range of leaders to demonstrate the benefits to all of building positive relationships throughout the region and the globe. I hope you agree and look forward to receiving your views on this.