@Ionus,
Ionus, the sale of indulgences was an
official policy of the Catholic church. This practice was one of the reasons Martin Luther spoke out against the church.
As a Christian, I don't mean to pile on here; but your argument fails. Unless I've misunderstood you, you seem to be saying that moral failings on the part of believers is the result of atheists sneaking into churches for the purpose of discrediting them.
I'm reminded of a former member of my congregation who admired the John Birch Society. I told him that during the mid-1960s the local chapter of the JBS once tried to ruin my sister's life by blacklisting her. They even held a press conference for that purpose. Her offense? She had launched a petition to the national headquarters of her sorority urging them to drop their racist by-laws. She had also participated in a peaceful demonstration against the "whites only" hiring practices of the largest employer in the town where she was attending college. The JBS was trying to discredit the civil rights movement by claiming it was a Communist conspiracy orchestrated by Moscow. So, they falsely accused my sister of being a Communist.
Anyway, this former member of my congregation agreed that my sister was mistreated; but he would not blame the JBS for their own actions. Instead, he said this local chapter of the JBS had been infiltrated by Communists for the purpose of discrediting the JBS!
I don't mean to pile on here, but your argument regarding moral hypocrisy on the part of believers seems to be quite similar to this individual's defense of the JBS.
The simple truth is that some deeply religious individuals engage in despicable conduct while others remain true to their profession. Wasn't Torquemada devout? I didn't want to believe this as I was growing up, but in the United States the Ku Klux Klan has always had a religious orientation. The oppression of black Americans under Jim Crow was based largely on the perversion of certain scriptures.
Obviously, I'm not an atheist; but I recognize the fact that morally speaking, atheists are just as varied as the rest of us. I've greatly admired the late Christopher Hitchens for his denunciation of Henry Kissinger, who committed crimes against humanity as the Secretary of State of this country; and, of course, the late Dr. Andrei Sakharov, who was one of the leading dissidents in the former Soviet Union, was an atheist. He even publicly condemned the persecution of religious people by the government of his country. Truly a noble spirit.
Hypocrisy, along with man's inhumanity to man, is a universal constant.