You just answered your own question !
And that coupled with the naughtiness of the Ayatollahs doesn't exactly endear me to them !
So I think we should treat Iran as a purely 'business relationship' - there is no need to cultivate economic integration, social & cultural ties with them or even taking more than the required amount of interest in whether the International Community is going to castrate them or reconcile with them, unless of course we gain to make or lose something from it !
Our ties can be upgraded to something more at a later date after some fundamental issues have been resolved & some behavioral changes enacted !
Don't get me wrong - I have no ill will towards Iran ! God Bless & May they Prosper but I hope that God Blesses them & their Prosperity within the Territorial Confines & Ambitions of their own country - Not mine or any other !