Why does Tybalt hate mercusion so much?

Tybalt hates Mercutio because of his association with the Montagues, whom the Capulets are bitter enemies with. Tybalt sees Mercutio as a threat and an insult to his family's honor, which fuels his animosity towards him. Tybalt's fiery personality and disdain for anyone allied with the Montagues further exacerbate his hatred towards Mercutio.