What makes Gonzalo feel uncomfortable despite the storm?

In the exciting opening scene of the play, the King of Naples and his group of nobles struggle to survive the violent tempest that threatens to sink their ship. As the Boatswain attempts to rouse the mariners to action by directing them to take in the topsail, Alonso and Antonio begin to give the Boatswain directives. The Boatswain responds by telling the nobles to get below deck because they are in the way. The Boatswain's attitude makes Gonzalo feel uncomfortable. Gonzalo is taken aback and disturbed by the commoner's disrespectful tone towards the King of Naples. The Boatswain continues to disrespect Gonzalo and the nobles by mentioning that he could care less about their titles and is only concerned about his own fate. When the Boatswain briefly exits the scene, Gonzalo reveals his contempt for the commoner by saying,

"I have great comfort from this fellow. Methinks he hath no drowning mark upon him. His complexion is perfect gallows. Stand fast, good Fate, to his hanging" (Shakespeare, 1.1.23-26).

Overall, Gonzalo is uncomfortable with the Boatswain's manner and tone while addressing the nobles on the ship. In the midst of the chaotic storm, the Boatswain completely disregards proper social conventions by rudely addressing the nobles and dismissing their concerns.