US/UK oilcos were kicked out of Iran, like they were kicked out of Iraq. Both countries' oilcos desperately want to get at Iraq's oil. No matter how many $100Bs in oilco profits, the oilcos are NEVER satisfied.
Iran-with-nukes is just smokescreen, since everybody knows, esp the mullahs, that Iran would be obliterated along with whomever to Iran's first nuke. Guaranteed suicide.
M.A.D. keep the nuclear war from happening.
US warriors are being pushed by the oilcos and neo-cons, and of course, the MIC would suck in $100Bs in taxpayers' wealth. MIC/oilco gain, Human-Americans' pain and poverty.