What satisfaction would be for us, oh Janārdana, in killing the sons of Dhṛtarāṣṭra? Sin would surely take shelter in us upon killing these aggressors

The internal contradiction is evident. Arjuna calls the Kauravas ātataayinaḥ (aggressors, those with weapons extended) — acknowledging their hostility — but simultaneously rejects defensive violence.

Janārdana (agitator of the people, or he whom people implore) is a subtler epithet: Kṛṣṇa as social disturbance and as refuge. The question kā prītiḥ (what satisfaction?) anticipates the later teaching on prīti (pure affection) vs. rāga (attachment).

Pāpam eva āśrayet (sin alone would take refuge) — eva (alone) eliminates any compensation. The verb āśrayet (would seek refuge in, would take possession) suggests that sin is not just consequence but entity claiming dwelling.