Self government within the context of the United States means a constitutional representative republic (Article 4, section 4:The United States shall guarantee to every State in this Union a Republican Form of Government,…). Unless SalusaSecondus is a properly elected or appointed official, serving in an office charged with this area of governance, he cannot carry out that responsibility.Self-government means self-government.
And that is precisely the reason I disagree with him as well. The pope has no authority or power to establish a state church, which is one of the two things the constitution prohibits government from doing (1st Amendment: Congress shall make no law respecting an establishment of religion,…) . By definition, he cannot violate the Constitution. So, public money necessary for security and the like even during the religious aspects of his visit is not a violation of the establishment clause.
Jon