Thanks for the reply (and your English is excellent!).
If Valinor were America, then it would be more the mythological America than the real one we find in history. The aboriginals weren't all peace loving Noble Savages. They share the same DNA with those that came later from the East, and that DNA contains the genes for war and other orc work.
Also, the natives used some tools, which, given more time, might have led to the smoke stacks that Tolkien seemed to hate.
That said, I can see what you mean about America being the idyllic paradise in the West.