In plain words
So the sages cursed them: ‘Out of Prema itself, may you hate Viṣṇu!’ They became Hiraṇyākṣa and Hiraṇyakaśipu, Rāvaṇa and Kumbhakarṇa, and Śiśupāla and Dantavaktra, three births in three yugas, and in the end they were liberated and reached Vaikuṇṭha once more.
God does certain deeds to establish Dharma
In God's work, every act has a reason. In the Mahābhārata, Kṛṣṇa told Dharmaja to say ‘Aśvatthāmā hataḥ’ aloud and ‘kuñjaraḥ’ softly. Hearing the news of Aśvatthāmā's death, Droṇācārya laid down his weapons. Then Dharmaja asked, ‘Kṛṣṇa! Is this Dharma?’ Kṛṣṇa said: “I have nothing to gain or lose in this war. I do not divide people into ‘you are mine’ and ‘they are not mine’. I act only to establish Dharma. There is no action I am bound to do. Yet if I do not act, the whole of Prakṛti will come to a standstill. To set the principles of pravṛtti and nivṛtti in Prakṛti on the right path, I must act.” After the war was over, Kṛṣṇa explained it to Dharmaja. “Droṇācārya was the guru of the Pāṇḍavas and the Kauravas, but he was a brāhmaṇa, not a kṣatriya. He had no right to wage war. Besides, to fight one's own pupils is adharma. In that way Droṇa strayed from Dharma. War has its own dharmas. Each must fight only the one he has been matched against, and must not fight as he pleases. They are enemies only so long as they are on the battlefield. Once the fighting stops, all are kin!” Ghaṭotkaca was born to Bhīma and Hiḍimbī. He was a rākṣasa. He took part in the war. He fought on in the battle until evening. As darkness fell, his strength kept growing. He was causing terrible havoc. No one had the strength to kill him. In the end Karṇa used on Ghaṭotkaca the weapon he had been keeping for Arjuna.