I'd say the difference is that Pakistan and India understand the idea of annihilation and aren't run by ******* nutjobs.
I would argue Pakistan is run by nutjobs and is not as far away from Iranian Sharia law as you'd like to think.
And what is the alternative? If we convinced ourselves that Sadaam had WMD's to justify our war with Iraq (which is over-simplifying the whole timeline and discussion at the time), if Iran has WMD's is that reason to invade Iran, which is 4 times the size and twice the population and borders on the same mountainous areas that make Afghanistan a nightmare to fight in?
It's not a realistic course of action. I just don't see it that way.
The only other thing would be engage only in air strikes. Use not only economic sanctions but bomb any/all nuclear processing facilities which would kill civilians as well as military targets (Iran will eventually use human shields to hide their uranium enrichment locations). I'm not sure that's a good course of action either. To me, that will create a generation of Iranians that hate the U.S. (as if the propaganda they hear isn't enough already). That hatred will lead to terrorism.
The last thing is to just let them go. Say **** it. If they show any signs of aggression let the world police them and use us as their muscle.
If Europe has their way, they will be 90% green energy by 2050. We produce all the energy we need. Let China and South Asia worry about Iran. Let Russia worry about Iran.
I'm just not convinced that if we continue on our energy independence production that we need to worry so much about the Middle East now, other than continue to support Israel and those that adopt democratic governments when they so choose.
Really, it's just thinking out loud. I'm not sure I 100% agree with this idea or not. I haven't thought it through from all the angles. All I know is that America doesn't seem to want to invest in a Marshall type plan that should have happened in Iraq and now Iraq is just proxy-Iran and lost back into Sharia Law and majority/elite rule with no real Bill of Rights to protect the minority.
We GAVE Iraq a chance at democracy and a republic and a Bill of Rights. We lost 5000 lives and spent almost $1 trillion for them to have that chance. And they rejected it.
At least I know when we fight for what's right in Europe, they appreciate the effort and use the opportunity to build a better government and better country. I just don't see that in the Middle East at all.