What on earth makes you assert the USA just 'wants war'? If this war goes on for too long Trump is cooked. He'll lose the election and might even be unpopular enough to cop the persecution he deserves.
The "Department of War" they created before promptly starting an absolute textbook War of Aggression is evidence beyond a reasonable doubt that the war was premeditated.
USA is the destabilizing force. In the case of Iran specifically, what happenes today is in many ways a consequence of the 1953 coup.
US and Israeli leaders have said recently that the war will continue until Iran is not a threat, for mostly the exact reasons you just listed. I'm not sure how you bomb the religious zeal out of someone.
I was listening to a fairly right wing British pundit today, who is very publicly funded by British and European NATO interests, he said that the US saying they will continue to bomb Iran until it is not a threat reminded him a lot of one of Russia's state Ukraine war goals of "we will de-Nazify Ukraine".
very open ended nebulous goals with the benefit of being easily stretched around any agenda the invading party has at the moment.