Christians are an ingroup? Tell that to any Christian living outside of the American South. Ingroup/outgroup statuses are context- and scope-dependent.
Over the last 10-20 years, Christians (particularly fundamentalists) have had very little involvement with cutting-edge AI, both on the technical side and the business side. In this sense, they’re an outgroup of the people who are likely to control ASI.
Suppose that you disagree with 80% of the people around you about a particular belief, but you’re correct. If the belief is complicated, with lots of supporting premises and independent lines of evidence, then it’s difficult to think about rigorously, so you’re likely to rely on heuristics.
In this case, there are at least two heuristics that will push your belief toward falsehood:
Social desirability bias. Unless you’re unusually contrarian, you’ll face psychological pressure to agree with the people around you.
Availability bias. Because people tend to list arguments that support their conclusion, you’ll be exposed to opposing and supporting arguments at a ratio of 4:1. Because people tend to treat things that are easy to recall as more likely to be true (the availability bias), you’re likely to give the opposing side more credit than it’s due.
In both cases, but especially the second, counteracting the biases requires you to expend effort to generate supporting arguments.