Please follow the link above to read the entire letter, but here are some excerpts:
Dear Mr. President
I am presenting this open letter as one of the serious opponents of the Islamic republic of Iran on behalf of the like-minded opposition groups and myself. Because of my knowledge of this regime, especially of Ali Khamenei who is my uncle (my mother’s brother), I see it as my duty to inform you about this regime and the issue of nuclear negotiations with the Islamic regime of Iran.
Let me at first inform you that the regime that falsely calls itself a republic came to power in 1979 by deceiving Iranian people and the world through provoking Iranian people against the regime of Mohammad Reza Pahlavi and gaining the support of the world community.
Obviously Dr.Mahmoud Moradkhani (the author of this letter is not a supporter of the current Iranian regime).
He also states:
We can find a historical example of this kind of deception prior to the Second World War. Hitler manipulated and deceived German people and European countries and the hesitation in addressing the problem with Hitler led to a great disaster.
Due to the changes in time, the domain of the disaster might become limited now but breach of human rights is the same, regardless of the number of people who become victimized in the process.
Ali Khamenei and his collaborators know very well that they will never become a nuclear power. They certainly do not have the national interest of Iranian in their mind; they just use the nuclear issue to bully the countries in the region and export their revolution and middle-aged culture to other countries. Obviously, you and European countries do not give the Islamic regime any concession unless you are certain that they comply with the agreement. The Islamic regime of Iran will certainly prolong the verification period the same way that they have delayed and prolonged the nuclear talks. It is in this period that the wounded regime will retaliate with its destructive policies.
The countless breaches of human rights violations, spreading of Islamic fundamentalism, intervention and creating crisis in the Middle East are all unacceptable and contrary to democratic and humane beliefs of yours and ours.
I would love to know why he believes that Iran will never become a nuclear power. I expect that Israel will not allow that to happen, but I am not sure that is what he means.
What we currently have in the Middle East is an all-out war between the Sunnis (led by Saudi Arabia) and the Shiites (led by Iran). The nuclear deal reached with Iran by the Obama Administration in its current form would simply fund the Shiite effort in that war. That is one of many reasons why this treaty must be kept from taking effect.