It must have been realised that the letter to Secretary of State Hillary Clinton, signed by nearly 300 members of the U.S. Congress, affirming their commitment to Israel, would be widely publicised and fall into the hands of that illegal Apartheid State, so the writing and signing of that letter should be considered an act of treason.
The letter has totally undermined the power of the President of the United States by virtually telling Israel: "It does not matter what you do to the Palestinians, how many illegal structures you build on the territory you stole from them; how you behave towards the Lebanese, or what you have in mind for Iran, we, the signatories on this letter are with you, all the way."
I am not a citizen of the United States, I am a citizen of a world that is being ruined by Zionism and its practitioners' thirst for power and greed for land that does not rightly belong to them. Having goaded the United States to attack Iraq, it is now attempting to draw it into a pre-emptive attack on Iran, while continuing to lie about the reason. The Iranian president did not threaten to "Wipe Israel off the map". Juan Cole, a professor of Middle Eastern studies at University of Michigan who reads Persian, has explained that President Ahmadinejad actually stated (quoting the late Ayatollah Khomeini): "The Imam said that this regime occupying Jerusalem (een rezhim-e ishghalgar-e qods) must [vanish from] from the page of time (bayad az safheh-ye ruzgar mahv shavad)."
What Israel and the perverse mainstream media has turned this into can be compared to a Farsi speaker saying: "Nothing lasts forever." And having this turned into, by the likes of the BBC and CNN and the press: "I'm going to kill you."