People are all different, so the reasons for them believing in conspiracies cover a broad range of factors. In general, though, people tend to believe in conspiracies because of helplessness.I found that belief in conspiracy theories is strongly linked to insecurity about employment, alienation, lack of interpersonal trust, and minority status ...
The reason why people believe in conspiracy theories is ignorance of ongoing stuff on earth. If people have enough information about ongoing events, people do not believe these ridiculous conspiracy theories for sure.