In cases where criminal activity happens among Chrisitan clergy and leaders public authorities should and must be brought in. No crime is to be hidden when the law has been broken (see Romans 13).
In the case of petty squabbles, political infighting and power struggles...it is to our shame that this is paraded in the streets of the world. An aquintance sent me this article today - it breaks the heart to see...
We appeal to our brothers to settle their affairs in humility for the good of the gospel, for the sake of our Lord's name. Let not his name be blasphemed because of us...
6:1 When one of you has a grievance against another, does he dare go to law before the unrighteous instead of the saints? 2 Or do you not know that the saints will judge the world? And if the world is to be judged by you, are you incompetent to try trivial cases? 3 Do you not know that we are to judge angels? How much more, then, matters pertaining to this life! 4 So if you have such cases, why do you lay them before those who have no standing in the church? 5 I say this to your shame. Can it be that there is no one among you wise enough to settle a dispute between the brothers, 6 but brother goes to law against brother, and that before unbelievers? 7 To have lawsuits at all with one another is already a defeat for you. Why not rather suffer wrong? Why not rather be defrauded? 8 But you yourselves wrong and defraud—even your own brothers!
ESV Bible Online: Passage: 1 Corinthians 6Praying for all of us...that we would have the same mind as Christ - that of a humble slave.