Why did the great goblin and many of his helpers get upset when they saw the sword?

The Great Goblin and his helpers were upset upon seeing the sWord because it was Glamdring, the legendary sWord of the ancient king Turgon. They recognized its significance and power, realizing that it could pose a threat to them, especially in the hands of their enemies. The appearance of such a formidable weapon heightened their fear and anxiety about the intruders, leading to their aggressive reaction.