Bhagavad-gītā cannot be interpreted by foolish commentators. It must be studied through the paramparā system, ācārya upāsanam. One must worship the ācārya and learn from him what is Bhagavad-gītā. Ācāryavān puruṣo veda (Chāndogya Upaniṣad 6.14.2)—this is the Vedic injunction—who knows things as they are. Ācāryaṁ māṁ puruṣa, one who is under the guidance of ācārya. So you won't find this foolish nonviolence theory from any ācārya. Many ācāryas have commented on Bhagavad-gītā—there is Rāmānujācārya, Madhvācārya, even Śaṅkarācārya—but never said that Bhagavad-gītā is proof of nonviolence. Nonviolence is good, but when there is dharma-yuddha, righteous fighting, there is no question of nonviolence. Violence is approved.
Therefore Kṛṣṇa says that tataḥ sva-dharmaṁ kīrtiṁ ca: "You will, by neglecting your sva-dharma, your professional or occupational duty, and minimizing the importance of your recognition, kīrti . . ." Kīrtir yasya sa jīvati: "Anyone who is reputed for his good activities, he lives forever." Kīrtir yasya sa jīvati. Bhaja sādhu-samāgamam. Tyaja durjana-saṁsargaṁ bhaja sādhu-samāgamam. Cāṇakya Paṇḍita also says kīrtiḥ sa . . . who lives forever? One who has got reputation for his . . . one who is famous for his good activities. "So don't try to lose your reputation. You are a great fighter, recognized by so many authorities, and if you don't fight, then people will say, 'Now Arjuna is finished. He cannot anymore fight.' So don't lose this reputation. Don't be deviated from your occupational duty as a kṣatriya. If you do all these things, then pāpam avāpsyasi. You don't think that it will be pious. You will, on the other hand, you will become impious." Pāpam avāpsyasi. Next verse.