You have selectively chosen your topics to support your argument (not much of an argument by the way) but I understand your POV.
You portray the USA as a selfless saviour, but the USA had to do those things it did in WWII to protect its own interests and if you had any real idea they didn't do it for free either. Check Britain's debt to the US after WWII.
I would perhaps temper my argument against US imperialism (except for its open support for vile South American dictatorships pre and post WWII) by saying that its imperialist agenda was not so all encompassing before WWII, and that there were humanitarian aspects to the Marshall Plan.
However, all that changed with the passing in 1947 of the National Security Act. This Act mandated a complete change in the military organisation and foreign policy of the USA. At the same time this Act created the NSC and the CIA. Since then the USA has progressively thrown its weight around. Today it's the world's most powerful bully - but that's OK, it's OUR bully right?
You didn't mention the neeedless war the USA waged against the Vietnamese - which one of its architects McNamara has since admitted was all a 'mistake'. You didn't mention the needless invasion of Iraq - Iraq had nothing to do with 911, Osama bin Laden, or any of the terrorist world threats (Saddam Hussein would not countenance any opposition to his dictatorial rule and would have eliminated ObL had he shown his face in Iraq). One day some mealy mouthed US spokesman will be telling the world Iraq was a 'mistake'. Incidentally, both of those wars were instigated by the deliberate lying of the American administration of the day.
I won't mention Israel's complicity in the mess which passes for current American foreign policy, since they are the major architects of it!
You can believe what you want about the USA being 'whiter than white', but that only ignores the other side of the balance sheet.
As for your presumptuous and arrogant comments about my political leanings your ignorance is again to the fore. You have little ammunition in your armoury, you have no real ammunition at all so have had to resort to throwing mud.
Your attempt to dismiss my criticisms of the USA has all the force of being hit with a wet lettuce.