1.Thorin's Company Disturbance: When Thorin Oakenshield's company of dwarves entered the Misty Mountains, they inadvertently disturbed the slumber of the Great Goblin and his vast goblin army. The Great Goblin was already known for being short-tempered and quick to anger, and the unexpected intrusion into his domain further fueled his rage.
2.Theft of Treasure: As the dwarves explored the goblin caves, they discovered a trove of stolen treasure, which included the Arkenstone, a valuable gem of great significance to the dwarves. The Great Goblin was enraged by the audacity of the dwarves for daring to steal from him, and he saw this as a direct challenge to his authority and power.
3.Escape Attempt: After capturing most of Thorin's company, the dwarves managed to escape from their goblin captors. This escape attempt further humiliated the Great Goblin and made him even more furious. He could not tolerate such defiance and vowed to pursue and punish the dwarves for their insolence.
4.Loss of Face: The Great Goblin prided himself on being the fearsome ruler of the Misty Mountains, and he could not stand the idea of losing face or appearing vulnerable in front of his goblin subjects. The combined factors of the dwarves' intrusion, treasure theft, and successful escape greatly diminished his reputation and authority, driving him into a state of uncontrollable rage.
5.Challenge to His Rule: The Great Goblin considered Thorin and the dwarves as insignificant beings compared to his vast goblin army. Their defiance and ability to outsmart him challenged his dominance and superiority, triggering his intense anger and desire for retribution.
It is worth noting that, throughout the story, the Great Goblin is characterized by his violent nature, unpredictable temperament, and ruthless leadership style, which make him prone to frequent episodes of rage.