According to this excerpt from book 24 of homers odyssey why dose eupithes want revenge against ulysses

Eupeithes wants revenge against Ulysses because everybody knows about the massacre in Ulysses´ hall. It was during such an event that Eupeithes´s son was slaughtered by Ulysses and then Eupeithes wants to rise up against him and his rule.He claims for revenge before a council and the council validates his petition.With the favor of the gods on his side, Ulysses wants to stop the upheaval but Eupeithes insists on his plans and marches with his men to kill Ulysses .Unfortunately, he is killed by Laerthes, Ulysses ´ father.