The study, "Global evidence of extreme intuitive moral prejudice against atheists," published in the journal Nature Human Behavior found that many find religion to still be a staple in morality while finding atheists to be immoral and even serial killers. Three thousand people from 13 different countries participated in the study. The study was conducted via a survey by associate professor Will M. Gervais
Source:
https://www.nature.com/articles/s41562-017-0151
https://www.nytimes.com/2017/08/07/health/atheists-religion-study.html
http://www.dailymail.co.uk/sciencetech/article-4758164/Atheists-naturally-assume-immoral-people-atheists.html