The REAL Reason Why Iran Should Not Get a Nuclear Weapon
In a single word, proliferation.
Iran with a nuclear bomb will use it to threaten and coerce other nations to their will, directly and indirectly. Worse, other nations around Iran will also want the capability. Think not? Saudi Arabia has already said that if Iran obtains the nuclear bomb it will consult with Pakistan and obtain their help to obtain one also. That should be quite easy, why? Well, it was Saudi Arabia that financed much of Pakistan's quest to get the capability. Once they did, they now have 20 or so. If Iran gets the bomb, Saudi Arabia could easily ask for payback in the form of one or two such bombs and platforms to launch. They would not have to build reactors or deal with weaponizing them. You only need a few to retaliate or thwart any pressure from Iran. There would be nothing stopping the Saudis as they have the oil the West needs. So, even if the US applied pressure, Saudis would just ignore it.
Turkey, a NATO member, has also said that if Iran gets the nuclear weapon, they will get theirs as well for self defense purposes. Turkey would have a much more long and difficult time getting one UNLESS Israel or the West gives them one or two such weapons, which I greatly doubt. But Turkey has been known to basically go their own way on other issues despite the West's pressure not to.
Well, you know, the next country seek nuclear capability with be Egypt, all for the same reasons and all are justifiable from their perspective, I mean, Israel has had many nuclear bombs for many years, so, why shouldn't others? The problem with this thinking is the historical hate between the Arabs and Jews. At least Israel is responsible and would never use them unless up against the wall.
The other countries, I am not so sure. Power of having the bomb corrupts clear thinking if in the wrong hands. There is so much hate spewing out of many Arab countries towards Israel and others, it only takes one loose cannon to cause a nuclear Armageddon.