Prejudice is a major cause of in-groups as similar minded people, with alike prejudices, might join to form a clique. Some consider cliques to be a social norm, and to "fit in", they feel compelled to join one. Scapegoating a common tactic used by mobs to blame one, or a few individuals, even if there isn't sufficient evidence to prove guiltiness. Equal status contract explains why people form cliques and why they can act hostile to others, but not to people in their "group". Using attribution theory, one can model a situation to determine the causes of actions and behaviors.
1.Scientists believed that chemical
Learn the local language, wear more neutral clothing instead of their traditional or foreign style. Make safe havens in the community, some assimilation is done to protect the current culture of the area, but some are done to protect the new movement of culture.