Why is the cyclops not impressed with Odysseus threatens him with vengeance of Zeus?

The Cyclops, Polyphemus, is not impressed with Odysseus's threats of vengeance from Zeus because he does not fear the gods. He believes himself to be stronger than the divine and views Odysseus as a mere mortal, dismissing the idea that any god would intervene on behalf of a stranger. Additionally, he is confident in his own power and isolation, feeling invulnerable in his cave away from the influence of the gods. This arrogance ultimately leads to his downfall when he underestimates Odysseus and the consequences of his actions.