When asked about Christianity's recent contributions to society, Americans cited more negatives than benefits.
The negative contribution cited most was hatred or violence in the name of Jesus, according to the Barna Group survey.
Others included opposition to gay marriage and the Roman Catholic Church's sex abuse scandal.
The positive contributions included Christians helping the poor, evangelism and influencing the country's values.
One in four respondents couldn't name anything positive, while 12 percent couldn't think of a negative contribution.
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