Ask an individual living in the United States if all Americas are “the same.” Ask them to imagine someone living outside the country who generalizes that Americans are carbon copy replicas representing the ideology of whoever happens to be President of the country, for example. I think, at least in this, most would unify in a quick response - heck no! We are not all like that leader - don’t assume!
And yet, that same person might suppose all others are replicas of whoever represents their region / culture / cohort as a president or leader.
Inquiry: Why the failure on our parts to notice that this obviously misguided conclusion applies in both contexts?