Countries are simply conventions. They are merely agreed upon borders marking off the dominant authorities in various locations. All kings, presidents, and legislators will fade away, for their power is nothing when compared with the King of kings. Ethnicity is nothing more than a marker for certain cultural and geographical backgrounds possessed by a group of people. This is how the Scriptures tell us to think in the Church. There is neither Jew nor Greek, Barbarian nor Scythian, African nor European, British nor Canadian; for we are all one in Christ Jesus our Lord.
National or ethnic identities are useful for distinctions as well as for understanding one's heritage. Yet, in spite of those distinct local customs, there is only one people of God. No matter how many different local practices we may have, those differences are not supposed to separate us from one another, but merely distinguish us from each other. Certainly there are sinful divisions that exist between the people of God–not all are in communion with the Holy See–yet we are supposed to be working to destroy all things that divide, not create more divisions. Anything that would create more wedges between Christians than there already are is wrong, and anything that would create wedges between Christians who are already in union with one another is even worse.
Ordinariates will be established within the geographical boundaries that we call countries merely for the sake of convenience and clarity of jurisdiction. These countries are allowed certain distinctives but those distinctives are nothing more than common practices (be they good or bad). An Australian Ordinariate has no essential differences with an Ordinariate in Argentina. I may dislike something about another country, but that has nothing to do with the fact that we are called to be Christian first, and national last. There are not supposed to be "Chinese Catholics" or "African Catholics" or "French Catholics" or "Mexican Catholics". These are things that we have created; not what God has commanded. The Ordinariates will be Catholic; not American, nor Japanese, nor anything else. In the Church all such divisions must be abolished because, "He is our peace, Who hath made both one, and hath broken down the middle wall of partition between us" (Ephesians 2:14).