tasman narha vayam hantum dhartarastran sa-bandhavan। sva-janam hi katham hatva sukhinah syama madhava॥ 1.37 ॥

Sin alone will accrue to us as the result of killing these desperadoes. Therefore, Krsna, it does not behove us to kill our relations & the sons of Dhritarashtra. For how shall we be happy after killing our own kinsmen?

yady apy ete na pasyanti lobhopahata-cetasah:। kula-ksaya-kritam dosam mitra-drohe cha patakam॥ 1.38 ॥ katham na jneyam asmabhih: papad asman nivartitum। kula-ksaya-kritam dosam prapasyadbhir janardana॥ 1.39 ॥

Although these people, with minds blinded by greed, do not perceive the evil of destruction of one's own race and the sin accruing from enmity towards friends. Why should we, O Krsna who see clearly the sin involved in the destroying of one's family, think of turning away from this crime?

kula-ksaye pranasyanti kula-dharmah sanatanah:। dharme naste kulam krtsnam adharmo ’bhibhavaty uta॥ 1.40 ॥

Age long family traditions disappear with the destruction of a family; and virtue having been lost, sin takes hold of the entire family.

adharmabhibhavat krishna pradusyanti kula-striyah:। strisu dustasu varsneya jayate varna-sankarah:॥ 1.41 ॥

With the preponderance of vice, O Krsna, the women of the family become corrupt; and with the corruption of woman, O Varsneya (descendant of Vrishni), there ensues an intermixture of castes.

sankaro narakayaiva kula-ghnanam kulasya cha। patanti pitaro hy esam lupta-pindodaka-kriyah:॥ 1.42 ॥

Intermixture of castes leads the destroyers of the race, as well as, the race itself to hell. Deprived of the offerings of lumps of rice & water ( Shraddha, Tarpana, etc.), the manes of their race also fall.