There are two objective positives from being part of a group. One is that you all believe the same things. It’s the upside to “groupthink.” Not necessarily bad. The second is a psychological positive of feeling good to be part of the group. You believe the same things, and there are psychological benefits like acceptance, approval, significance, respect, and love from the relationships that flow out of those groups with shared beliefs. The dangerous dark side of these communities is when the benefits, e.g., finding approval, become more crucial to you than whatever the group believes. The temptation is to compromise what you believe because the benefits of connecting with a relational community are more vital.