Kama it is!
Having established that desireless action is the ideal, Arjuna asks the obvious: if we know what is right, why do we still do wrong? Krishna identifies the culprit: kama (desire, lust, greed) and krodha (anger). These are the twin enemies that cloud judgment and drive humans to act against their own wisdom.
Arjuna asks: what compels a person to sin, even against their will? Krishna’s answer is devastating — it is kama (desire/lust), born of rajas, the all-consuming enemy that veils wisdom like smoke veils fire.