In the context of the Bhagavad Gita the quote given by Oppenheimer is actually pretty accurate if you look up the relevant passage in Sanskrit and consider possible translations: Chapter 11, Verse 30-33 [0].

A quick summary of the context in the Bhagavad Gita:

Ajurna, an aristocratic (Pandava Prince) warrior highly skilled in archery - right before engaging in a battle of two armies (two groups of cousins: Kauravas and Pandavas) for the succession of the throne - upon seeing all his close kin arranged in two opposing parties all with their unique skills and feats ready to kill and be killed - the warrior prince falls into a deep emotional turmoil. He begins to talk to his charioteer Krishnu who reveals himself to be an avatar of the deity Vishnu.

This dialogue evolves into a whole contemplation in which a part of the upanishadic cosmic view gets revealed to Arjuna/the reader; somewhat akin in style to the secular western form of Plato's dialogue (in this case the Socratic method is led by "reason" or "logos" not a sophisticated mythology like an avatar of a specific deity).

The dharma in the specific case of Ajurna, is to fulfill his caste duty of Kshatriya [1].

Or from the lens of quantum mechanics and modern history the bomb in some way or another was inevitable.

Its fine-tuned parameters (1) put in the Big Bang, the idea (2) conceived by Szilard [2] and the Anglo-American military apparatus (3) rather than merely convinced in its superiority putting the actual resources/technology into the ultimate pragmatic use [3][4] (first mover & cost/risk-reward ratio).

[0]https://www.holy-bhagavad-gita.org/chapter/11/verse/30

[1]https://en.m.wikipedia.org/wiki/Kshatriya

[2]https://www.newscientist.com/definition/invention-nuclear-bo...

[3]https://en.wikipedia.org/wiki/German_nuclear_weapons_program...

[4]https://en.wikipedia.org/wiki/Werner_Heisenberg#Membership_i...