Elections in Iran regularly make international news as pundits from the West try to discern what's in the wind coming from that quarter of the world.
Elections in Saudi Arabia don't make international news because there aren't any.
Properly courted, the Islamic Republic of Iran would prove to be the best ally the West could have in Central and South Asia. Iran would, however, insist on being an ally of equality. This is not something the West has a history of supporting anywhere within the Islamic crescent, that stretch of global geography lying between the Atlantic Ocean off Morocco and Xinjiang Province in western China.
At a time of readjusting, if not diminishing, western power, it might be in everyone's interest to think more carefully and where our anti-Iran bias is taking us.

Anti Iran basis? Sure why not? Or should we simply ignore a murderous regime that simply eliminates any dissent or any "VISIBLE" resemblance of any real freedom to choose, the very bedrock of real democracy. Ditto, or even more so, Syria!
Don't forget, if bellicose belligerent Iran becomes involved in any exchange of thermonuclear weapons, with any other nuclear armed power, most of its own civilian population and immediate neighbours, will inevitably become the unavoidable collateral damage!
Why should neighbours, like Saudi or Jordan wear that; or indeed, any pretence of any historical loyalty or ethnic similarity, with a very different Iran?
There's a very old saying that ostensibly has its roots in the Middle East, which goes, "my enemies enemies are also my friends."
Patent self interest pragmatism will always ultimately prevail, or trump some mystical ethnic based loyalty or idealism. Loyalty is after all, a two way street and respect must be earned rather than something that can be simply demanded by manifest mindless miscreants?
A genuinely progressive and gradually changing for the better, Saudi, may well not be a democracy, but I'll warrant its citizens and or dissidents, enjoy more personal freedoms and freedom of movement; than any inside a completely opaque and rigidly controlled Iran, which has more to fear, I believe, from internal dissent or the spread of the Arab spring; than its completely disenchanted former friends? Rhrosty.

No surprise - this is as should, just as in world-war II the Americans and the Soviets cooperated against the Nazis.

Iran has invaded no one.Since WW2 USA has attacked North Korea,Vietnam,Iraq,Somalia,Pakistan, Aghanistan,Libya and interferrred with the politics of numerous countries.

Who has the track record of war and violence?

The USA also invaded Grenada during Reagans "Reign", because the democratic choice of the people of Grenada at the general election, chose a politician to lead the country, who was of the left.
Similar action was taken by Reagan in Central America and Chile where Regan gave support to a facist dictator, and it would appear without thought for the thousands of Chileans who disappeared.