Verdict: Misleading. The evidence supports the narrower conclusion that unethical religious leadership can harm people, communities, and perceptions of religion, but it does not establish that corrupt Christian leaders have caused greater damage to people’s faith than any comparison group or factor.
Corrupt Christian leaders have done more damage to people's faith
The Claim
Corrupt Christian leaders have done more damage to people's faith

Beware False Teachers with Good Doctrine and Bad Ethics - Christianity Today
Source: christianitytoday.com
What the Evidence Shows
What is established
One commentary argues that a leader’s unethical conduct can cause people to stumble, go astray, or turn away from Christianity.
The same source describes harm to people and communities associated with misconduct by several prominent pastors.
Another commentary states that misconduct by religious leaders can reflect negatively on religion as a whole.
A separate source reports that some people viewed deceit and double standards in Jewish religious institutions as reasons they became alienated from religion.
Context and caveats
The evidence provides examples and commentary about religious harm, but it does not quantify the effect, demonstrate a generalized impact across people of faith, or compare corrupt Christian leaders with another cause of damage.
A theological reference discusses corruption as harmful to society and the church, but does not directly assess damage to people’s faith or make the comparison asserted in the statement.
The available evidence does not determine how widespread the effects of corrupt religious leadership are or whether they exceed the effects of other factors.