Who is Eupithes and why does he complains about the slaughter in the great hall in book 24

Eupeithes was Antinous' father.

"....Eupeithes rose to speak. He was overwhelmed with grief for the death of his son Antinous, who had been the first man killed by Ulysses, so he said, weeping bitterly, "My friend, this man has done the Achaeans great wrong. He took many of our best men away with him in his fleet, and he has lost both ships and men; now, moreover, on his return he has been killing all the foremost men among the Cephallenians. Let us be up and doing before he can get away to Pylos or to Elis where the Epeans rule, or we shall be ashamed of ourselves for ever afterwards. It will be an everlasting disgrace to us if we do not avenge the murder of our sons and brothers. For my own part I should have no mote pleasure in life, but had rather die at once. Let us be up, then, and after them, before they can cross over to the mainland."