Where do you get this crap about Iran being "crazy"? Fox News? Israeli and U.S. government propaganda?
General knowledge.
To be fair, upon going back over my collection of news reports I was surprised how few of them were about Iran as opposed to other Islamic nations. On the other hand I specifically claimed that Iran has a reputation for being batshit crazy rather than that it actually is batshit crazy. Scott Adams once pointed out that if you analyzed Iran's actions rather than their words they didn't seem nearly as insane.
Even so, there were some relevant items about Iran - and none about Jordon, though a more thorough search might turn up more.
Rafsanjani and Mashaei barred from Iran presidency poll - Only eight of the 686 people who registered as potential candidates were reportedly cleared to stand.
Ashton visit to Iran sparks co-operation and controversy - "Do you think our country has no order that you can go anywhere you want and see anyone you want to see?" the head of the judiciary, Ayatollah Sadeq Larijani, demanded on Tuesday night.
Iran sentences British-Iranian activist Ghoncheh Ghavami 'over volleyball game' - speaks for itself
Wikipedia, Human rights in the Islamic Republic of Iran, Freedom and equality of religion - Freedom to convert from Islam to another religion (apostasy), is prohibited and may be punishable by death.
There's also Iran's own constitution. The first five articles are all about how Islamic Iran is. In other words, they're a theocracy and don't even try to hide it. The preamble even says "... with the hope that this century will witness the establishment of a universal holy government and the downfall of all others."
The Supreme Leader has considerable power and is chosen entirely on religious grounds. In other words, he's chosen precisely because he's batshit crazy.
Can you really be so sure that one day the Supreme Leader won't decide to nuke Israel, counting on God to protect Iran from Israel's counterstrike?