Which theory might explain why people blame immigrants for the country's troubleseven though thete is no evidence for this?

One possible theory that could explain this phenomenon is the social identity theory. According to this theory, individuals tend to categorize themselves and others based on group membership, such as nationality. When individuals perceive a threat to their group's status or resources, they may engage in scapegoating behavior, blaming out-groups like immigrants as a way to protect their own group's identity and well-being. This can lead to misinformation and biased attributions towards immigrants.