What motivates Abby and Betty to begin denouncing everyone?

Abby and Betty are motivated to begin denouncing others primarily out of fear and self-preservation. In an environment where accusations can lead to severe consequences, they see denouncing their peers as a way to deflect suspicion from themselves and secure their own safety. Additionally, the pressure of societal expectations and the desire for social standing may further compel them to participate in the hysteria, as they seek to align themselves with the dominant narrative. Ultimately, their actions reflect a survival instinct in a climate of paranoia and distrust.