Just because someone hates you and calls you the devil (or loves you and calls you an angel) doesn't mean they think you're literally the physical embodiment. Especially when you're not even a living being but a country or a government. I'm pretty darn sure you can assume it's a metaphor and that your coworker doesn't have evidence to the contrary.
What is more important than proclaimed words is to evaluate actions of the said government.
The Iranians have been pragmatic and relatively restrained, while USA and Israel have repeatedly escalated.
Iran has been helping USA dealing with Al Qaida in Afghanistan and Isis in Iraq. As a payback, they have been included into the 'Axis of Evil' and subjected to heavy sanctions. Just one of the cases...
> Trust me, we, Ukrainians do mean that in relation to _anything_ that is to north-east of our country. A good rule of thumb is to always say for yourself.
Leaving aside that I am skeptical millions of Ukrainians sincerely believe the devil has been launching missiles at them from the northeast (regardless of what you write here)... it's rather hypocritical to speak for millions of Ukrainians and then tell me to only speak for myself, don't you think?