Of course it's a product of the European gene pools! That you have a few native Americans that you spent your best early (?) efforts trying to drive into the swamps, up the mountains or into the seas doesn't indicate any great desire to assimilate or integrate... folks from south of the border, from north of the border, all of them have had a helluva tough time hanging on. Listen to some Cajun or Texan songs.
Actually, the "temerity" to leave Europe was often more a reality of getting chucked out: we invented the concept of modern exile, as we invented Australia, but I leave claims to the biblical one elsewhere.
Funnily enough, many Brits have suddenly become Spanish. Yes, you certainly can become anything you want to become if the country permits it.
As a gene pool, maybe we are mostly European. From a cultural perspective, especially when it comes to being risk adverse, we are not European.
And last I checked, not many convicts were forcibly sent to the USA. Nearly all of our emigrants came here voluntarily. I cant speak for Australia, but I would assume the stereotype of it being a convict country is greatly over blown as well.
Last, like I said, politically maybe you can became anything you want. But will you actually be accepted as that? How many pure blood Anglo-Saxons do you know that have become Spanish citizens are actually regarded as being really Spanish by their fully ethnically Spanish countrymen?
I know many non-native Americans that I fully regard as Americans. I think it is reasonable to say this is a big cultural difference between the USA (and perhaps Australia and Canada) then most other countries. The simple fact that by definition there is no ethnic American or Australian or Canadian makes it easier on a language level to accept anyone as being one of those. My point being, the melting pot in Europe may not be working so well, as you claim, but that in the USA, and other countries, we have an advantage of diction not actively working against it.
Now being considered a true Philadelphian without being born and raised in the city, that's another question.
