I believe it's something about cultural similarity, yes, but for me this relates more with cultural insularity[1], and how each culture relates to each other, m

I believe it's something about cultural similarity, yes, but for me this relates more with cultural insularity[1], and how each culture relates to each other, much less about characters. [1]: This is a term by anti-americanists against anything relating to the USA, it's not my intention, I saw exactly the same thing happening in the UK, France, Israel, Germany, Ireland, Australia and Brazil., where I live