I don’t think anyone disputes that Superman is an American construct and symbol. But I suppose some folks take the “American way” expression as a tad heavy-handed - and perhaps needlessly jingoistic and parochial. And, btw, what is the American way? Is it Republican or Democrat?
Meanwhile, methinks there’s also a sense - among certain fans - in which “American way” is a kind of virtue signal for the proper (classic, traditional, etc.) version of Superman. I.e., if you defend the phrase (proudly, unapologetically) then you really “get” Superman; and if you take issue with it (for, say, the reasons cited above) then you may be an upstart revisionist or blasphemer.(Recall the uproar when SR changed the saying to “Truth, Justice… all that stuff.”)
* “ ….truth, justice and freedom.”
Source:
Truth, justice and (fill in the blank) - Editorials & Commentary - International Herald Tribune