You ought to read E. Michael Jones's "The Medjugorje Deception." According to Jones, the proper ecclesiastics have declared constat de non supernaturaliter, been assaulted by visonary groupies, caused a rebellion in the church etc [ the Bosnian Fransiscans completely rejected Rome's authority, and were repeatedly threatened with disbandment by Pius XII and JP II, and would have been were it not for the miraculous "visions."]
Either he is a liar extraordinaire, who trashed his business to pump out some extremely coherent falsehoods, or the apparitions are a fraud from a to z, which have even contributed to ethnic cleansing.
BTW not only did JP 2 refuse to go to that spot, but while in Croatia, made a point of praising a real (his words, not mine) site of Marian apparitions.
See post 116.
I did a bit of research on E. Michael Jones, and not all Catholics are comfortable with his positions. It is true that there are people inside the church who seek to do her harm. You have, however, interested me in him and I will be picking up a copy of the book you recommended.
Here is a link to someone opposing Jones--
An Open Letter to E. Michael Jones</a href>