Anton, what an anti-American little monkey you are!
The UK was about to beat Germany, and would have done so without America's help? That's simply nonsense.
America profited from WWII? I'm not sure my uncle who lost a leg on Omaha Beach would agree. And does your financial calculus factor in the cost of the Marshall Plan?
The US had no choice? More nonsense. I just heard someone refer to the Atlantic and Pacific oceans as America's greatest friends. No more, but back then it certainly was the case.
America, under different leadership, could have easily sat out both World Wars with little ill effect.
Japan attacked Pearl Harbor to keep the US out of the war, not to "drag them in" or as a first step in conquering them.
I never understood why Hitler declared war on the US, but then he was a wee bit irrational.
If America did not enter WWII on two major fronts, it is virtually certain the Japanese Empire would have ruled Asia and Australia. It is almost as certain that the Germans would have ruled Europe and Africa.
What would have happened next?
Sure, Germany and Japan could have tag teamed America, but considering the logistical challenges they faced, it is unlikely. More likely, Japan and Germany would have squared off in India or Russia. If one were able to defeat the other it would only be a matter of time before they came knocking at NYC or San Francisco, but they could just as easily exhausted each other's military power.
In short, the notion that a nation protected by two oceans and blessed with extra-ordinary natural resources "had no choice" but to intervene in WWI or WWII is simply absurd.
Of course this doesn't mean that the intervention was born solely of altruism, but it should be hard to impugn the motives of a nation that could easily have ruled the world post WWII and not only did not, but sunk tons of treasure into rebuilding the defeated wolves that started the whole mess.
But you know those vile Yanks --- they'll do anything for the promise of a buck. Just like...the Jews!