Religiosity is directly linked to ethnic centrism meaning that atheism is a self suicide of the group
https://www.sciencedaily.com/releases/2015/10/151014084955.htm>people in whom the targeted brain region was temporarily shut down reported 32.8% less belief in God, angels, or heaven. They were also 28.5% more positive in their feelings toward an immigrant who criticised their country. https://sci-hub.se/https://doi.org/10.2307/3512331>First, we have shown that Catholics and Protestants support prejudice against ethnic minorities to some extent>Second, we have found no evidence for the curvilinear nature of the relationship between church attendance and prejudice. We have shown that this relationship is linear, at least in European countries: the more frequent people attend church, the more they support prejudice.