Bolton who is on the Trump staff has long advocated war with Iran to stop them from developing nuke weapons. On the flip side, Khomeini has been waging war against the infidels (e.g., Sunnis and western powers) ever since he rose to power.
I think Khomeini wants war more than Bolton/Trump. He has visions of another Ottoman Empire but under Shia rule and Iran.
And as a Muslim, he's sure he has Allah on his side in his jihad. He has illusions of grandeur and really doesn't understand how small and insignificant his power base is.