"This is a thread about this traditional priest and his justification for abandoning his diocese and rebelling against his bishop."
It would appear that either you did not read - or cannot ( or will not) comprehend why this priest has chosen this route.
The "brutality" is that of the substitution of truly Catholic teachings, and mass with something radically different. The reality is that this "brutality" is inflicted upon all Catholics - to greater or lesser degrees. And "brutality" it is.
Re-read the quote form the 23rd Chapter of St. Matthew given above - and let it sink in.
Taking scandal in our prelates or situations in the Church is never an excuse to break away from her either spiritually or canonically.
Besides, his letter is not strong and relies upon his interpretation (or misinterpretation) of Fatima. Last I checked, belief in Fatima was not an article of Faith.
Perhaps I am wrong though...