After reading your link regarding denominations, it really points out how far afield from the original Catholic Church the Christian religion has come. As Martin Luther said on his deathbed (I'm paraphrasing here) now any Milkmaid can start a new religion. Even Martin Luther had a momentary vision of what was to become. In our day and age, I see many parallels with the Hellenistic Age, when sects and cults multiplied greatly. The Hellenistic Age was one of great uncertainty, with many wars and societal instability. Just like today, when we live in an age of great uncertainty, and new denominations, sects, and cults are springing up with great regularity. What goes around comes around.
Quote from Luther sounds about right. I do recall reading where he was bereft concerning the squabbles and splits that occured.