Another point to make is that if Ingellus did kill Swerting's sons, he would have also killed Beowulf's kin, which would render this whole ordeal a huge blood feud between different families.
He would have also killed Beowulf's kin. Ingellus did kill Swerting's sons. Another point to make is this. Beowulf's kin would render this whole ordeal a huge blood feud between different families.