Smt Janaki Ji
Mahabarata war was fought to sustain and uphold Dharma.
Sri Krishna showed abundant mercy on Karna by taking his Punya
For the soul to get liberated from the cycle of rebiths, one should not have any accumulated Papam or Punyam
Lord Krishna wanted to give moksha to Karna by voluntarily taking the punya from Karna.
Lord Krishna is like the sun in the sky illuminates His light on the noble and the vile, the sinful and the pious impartially. And as although sunlight touching the Earth is not affected by events that happen in the world similarly the Supreme Lord is not affected by the events which transpire in the life of human beings or any other being.
Svetasvatara Upanishad, 4.6, Mundakopanishad, 3.1.1:
'dva suparna sayuja sakhaya samanam vrksam pari asvajate /
tayor anyah pippalam svad vatt yanasnan nanyo abhicakasīti //'
Two birds of beautiful plumage — inseparable friends — live on the same tree. Of these two one eats the sweet fruit while the other looks on without eating.
The first bird represents the individual soul, while the second represents Brahman or God. The soul is essentially a reflection of Brahman. The tree represents the body. The soul identifies itself with the body, reaps the fruits of its actions, and undergoes rebirth. The Lord alone stands as an eternal witness, ever contented, and does not eat, for HE IS THE DIRECTOR of both the eater and the eaten.
Bhagavad-Gita: Chapter 5, Verse 15
Tree of Jiva and Atman - Wikipedia, the free encyclopedia