Ha-hem...
1) Iran is interested on nukes and new weapons. No one can simply sit and wait while someone develops nukes and new armaments like the Saegeh(I hope I spelled it correctly) and the recently developed missiles able to hit Israel.
Says who? Haven't they only expressed interest in developing a civilian nuclear program to help wean their country off its oil dependence?
2) Whoever claims that Israel should be cancelled shouldn't be allowed to keep the research on nuclear energy going. They're free to claim that they won't be developing nukes but...it's still dangerous. It's pretty much like giving a gun to a child.
They may talk big, but would they really commit to attacking Israel non-conventionally, knowing that it would invite instant retaliation in kind from the US? It's the same thing with people who try to make out North Korea's nuclear "capability" as show-stopping, end of the world type stuff: Dictators need a country to dictate over, and assured nuclear destruction isn't exactly how they want to write themselves into the history books.
If Iran was pursuant of nuclear capability, then it would be entirely for defensive purposes should any nation, perhaps a nation with considerable armed forces in the region and an historically itchy trigger-finger, prove aggressive towards her. In the modern world, nukes are
defensive. Say it with me now:
Defensive. Only the larger, considerably more powerful nations like the USA and Russia would dare to use their nuclear option in an offensive role, and even then the political ramifications would be devastating to either nation. So why then, when even the most powerful nations on Earth wouldn't dare press the button, is the danger of Iran potentially getting minor capability, in an indeterminate but lengthly amount of time mind you, so critical and dangerous?