Here's why:
* Astrology is not a definitive personality indicator. Zodiac signs are a fun way to explore personality traits, but they don't determine someone's entire character.
* Generalizations about entire groups of people are harmful. Assuming everyone born under a certain sign is "mean" is prejudiced and ignores the vast individual differences among people.
* Every individual is unique. People's personalities are shaped by a complex interplay of genetics, environment, experiences, and personal choices.
Instead of focusing on stereotypes, try to get to know individuals as individuals. You'll find that kindness and compassion are not limited by zodiac signs.