Answer:
to confirm preexisting beliefs
Explanation:
Confirmation bias
This is simply one's ability to seek, interpret, favor and recall information that is in line or conforms to an individual's pre-existing beliefs or expectations.
People here tends to likely view things that could conforms to something rather than disconfirm it.
Two reasons for the existence of onfirmation bias:
1. Directional motives: humans usually finds informations that is in line with our beliefs and expectations
2. Cognitive heuristics: It deals with things that views our beliefs and expectations usually we imagine first.