Bhagavad Gita is very clear. It appears in the first chapter itself. How do we decide who is an insider in a family, and who is an outsider? Who is mine, and who is not mine? As a warrior, Arjun has no problem killing people. But he has a problem killing family members. Krishna helps him overcome his moral issue by analysing what constitutes family, and how it impacts decision-making. This matters in family businesses today as it did in Mahabharat times. How do we separate the personal from the professional?
The Bhagavad Gita has nothing to do with violence or non-violence, duty or caste, as many people proclaim. Arjun is only wondering about the ethics of killing family members, since one is supposed to protect one's family, as per social norm. At its core, the Bhagavad Gita is trying to unravel the meaning and significance behind the possessive adjective 'my' and the possessive pronoun 'mine'.
Right at the beginning, Dhritrashtra asks, 'What is happening in the battlefield between my sons and the sons of Pandu?' He does not refer to Pandu's children as his nephews, very clearly establishing that he considers them outsiders. But when Arjun expresses himself, his dilemma is that he sees insiders on both sides of the battlefield. There is no outsider here.
Then, towards the middle of the Bhagavad Gita, Sri Krishna takes his cosmic form and demonstrates how everybody is inside him. Therefore, for God, nobody is an outsider. Yet, God has to decide who eats and who gets eaten. Krishna has to take a side in a debate,