Wannano:
But it apeared that that there was temendous overlap in Church and government roles and practice.
100% in many cases. This is also not the will of Christ, who was clear that His Kingdom is not of this world. The phrase “power corrupts, and absolute power corrupts absolutely” was first
written about a Catholic Bishop.
Also when history bears out that certain Popes were in fact evil and anti-Christ , even though they were the supreme ruler of the Church and the Vicar of Christ on earth, it is said that the Church was not tainted by these individuals.
I think that ever person who sins “taints” the Church. We, as members of His Body, can join His body to wrongdoing.
What we cannot do is taint the divine elements of the Church, especially the Holy Spirit who infallibly holds the teaching of the Apostles.
. As with any individual Christian, I believe the Holy Spirit directs and guides us into the fulness of Truth but how obedient we are in following is quite another story.
I think in this case you would agree that even if you sin, you do not undo the regeneration that has been brought about within you by the Holy Spirit.