Final answer:
Ares is angry at Cadmus because of an incident where Cadmus killed Ares' son while protecting his daughter. This reinforces the idea that the relationship between humans and gods in Greek mythology can be tumultuous and that angering the gods can have consequences.
Step-by-step explanation:
In Greek mythology, Ares, the god of war, is often portrayed as being angry at Cadmus, the founder and first king of Thebes. This animosity between the two figures can be traced back to an incident where Ares' son was killed by Cadmus while protecting his daughter from being attacked by the god. As a result, Ares holds a grudge against Cadmus.
This reinforces the idea that the relationship between humans and gods in Greek mythology is not always harmonious. The gods are known to have complex emotions and can hold grudges against humans. It also highlights the consequences of angering the gods, as Ares' anger towards Cadmus leads to ongoing conflict and tension between them.