“The idea that we’re living in a Christian nation in that sense is really a form of theological liberalism. It assumes that a person or a nation can be a Christian apart from the regenerating work of the Holy Spirit, apart from new birth. That is contrary to the Gospel.” …No, that is not what the phrase “Christian nation” means, Mr. Russell. Another one conflating the free exercise clause with the establishment clause, never mind being mendacious about the present state of being in Christian countries that do have state churches.
Sorry, the state church is not a biblically defined entity.
Have such countries arrogated Christianity? Yes.
Are they Christian per the bible? No.