I do think that most priests really do try to fulfill the PRIMARY purpose of a shepard: to PROTECT the flock. Some people (typically those with authoritarian personalities), have a distressing tendency to think that someone must 100% be correct if that person is trusted or in a position of power. There's no second-guessing, no confirmation, just the understanding that those 'above' you are always correct.
Hell, we see that constantly today, and it has been repeated over and over again on this very thread, as it's the heart and soul of Bible (and Qu'ran) literalism.
Couple that with the very human tendency to believe anything you're told by people you already agree with or like, and you get things like the Salem Witch Trials, the Inquisition (or the Sacred Congregation for the Doctrine of the Faith, to call it by its modern name), the Holocaust, and hell, even things like the murder of George Tiller, the Charleston church shooting, the Oklahoma City bombing, and 9/11.
When people believe God is on their side, they are capable of and willing to do literally ANYTHING, not matter how horrifying the action. Or as Voltaire said:
Formerly there were those who said: You believe things that are incomprehensible, inconsistent, impossible because we have commanded you to believe them; go then and do what is unjust because we command it. Such people show admirable reasoning. Truly, whoever is able to make you absurd is able to make you unjust. If the God-given understanding of your mind does not resist a demand to believe what is impossible, then you will not resist a demand to do wrong to that God-given sense of justice in your heart. As soon as one faculty of your soul has been dominated, other faculties will follow as well. And from this derives all those crimes of religion which have overrun the world.
Or, as it's usually mis-quoted:
Those who can make you believe absurdities can make you commit atrocities.
That is, in the end, why I am SO down on people who merely think what they're told to think without even TRYING to get at the actual facts of the case. Agree with what you're told in the end, if you must, but do it because the facts LEAD you there, not just because you were told to think that.
My true opposition, though, is for those who abuse their positions and take advantage of this tendency for either hatred or personal gain. Whether it's mega-churches raising millions per year for their 'pastors' to live in mansions, televangelists inciting hatred and violence against people who don't live the Quaker lifestyle, or "news" organizations like Fox News and Sinclair Broadcasting (who literally just forced all of its stations to read a condemnation of unspecified (and utterly unproven) Deep State agents (who are apparently all Democrats more loyal to party than nation) hidden in the federal government and working toward the destruction of the US) using propaganda to incite panic, fear, and hatred, they all are the spiritual descendants of Machiavelli, Torquemada, and the like, and they all embody the worst parts of humanity.