By these faults of the destroyers of the family, causes of confusion of castes, are destroyed the duties of caste and the eternal duties of the family

Arjuna summarizes the causal argument. The doṣāḥ (faults, defects) are not accidental but kārakāḥ (causing, active agents) of varṇa-saṅkara. The verb utsādyante (are destroyed, are made to fall, are eliminated) is violently active.

The distinction between jāti-dharmāḥ (duties of caste by birth) and kula-dharmāḥ (duties of family/clan) is crucial. Jāti is determined by birth; kula by specific lineage. Both are śāśvatāḥ (eternal, perpetual) in the traditional sense of “always existing in tradition,” though the text will question this eternality.

The participle kula-ghnānām (of the family-slayers) repeats, accumulating guilt before blood is shed.