Yikes, according to a study in Social Psychological and Personality Science:
Participants subliminally primed with Christian words displayed more covert racial prejudice against African-Americans (Study 1) and more general negative affect toward African-Americans (Study 2) than did persons primed with neutral words. The effects of priming on racial prejudice remained even when statistically controlling for pre-existing levels of religiousness and spirituality. Possible mechanisms for the observed effect of Christian religion on racial prejudice are discussed.
The link only has the abstract, so I’m not sure about the methodology, but that’s a kind of scary result considering all the religious propaganda in the States.
It should be noted that, in both experiments, the baseline level of covert racial prejudice was in the neutral range. Furthermore, the magnitude of effects in this study was small. Priming Christian concepts did not cause a large increase in racial prejudice, but it did lead to a small, significant increase. As such, we cannot conclude that priming Christian concepts causes racism per se; our data do not support this conclusion. However, we did find that priming Christian concepts causes a negative shift in existing racial attitudes and that the direction of the shift represents a slight but significant increase in racial prejudice.
The sample sizes of the two studies were quite small. Only 73 in the first experiment and 43 in the second. Participants were mostly white and Christian, but other ethnicities and religions were represented.
The second experiment replicated the results of the first, but further replications by other researchers are needed – preferably with larger sample sizes – before any conclusions can be drawn.
Also, the section “Christian Concepts, Racial Prejudice, and Possible Mediators Between the Two,” which covers the paradoxes of current religious priming research, is worth reading.