Why do Bengalis worship Goddess Kali on Diwali?

Bengalis worship Goddess Kali on Diwali as part of the tradition of Kali Puja, which coincides with the festival of lights. According to beliefs, Goddess Kali defeated the demon Raktabija by consuming every drop of his blood, preventing him from multiplying. Devotees worship her on the new moon night to seek protection from evil and negative forces.