Government is not a moral entity; in fact, there are instances where it can conflict with Christian morals. I was raised Catholic, and I'm pretty sure the church teaches the non aggression principle to some degree.

Even so, why would Christianity have a problem with everyone "being their own government", as they say? If you have Christian morals and have nothing impeding you from adhering to and acting upon those morals in terms of government, isnt that a net positive?

It sounds like your textbook was written by the biblical Pharisees, lol.