Duryodhana, a great diplomat, wanted to point out the defects of Droṇācārya, the great brāhmaṇa commander in chief. Droṇācārya had some political quarrel with King Drupada, the father of Draupadī, who was Arjuna's wife. As a result of this quarrel, Drupada performed a great sacrifice, by which he received the benediction of having a son who would be able to kill Droṇācārya. Droṇācārya knew this perfectly well, and yet as a liberal brāhmaṇa he did not hesitate to impart all his military secrets when the son of Drupada, Dhṛṣṭadyumna, was entrusted to him for military education. Now, on the Battlefield of Kurukṣetra, Dhṛṣṭadyumna took the side of the Pāṇḍavas, and it was he who arranged for their military phalanx, after having learned the art from Droṇācārya. Duryodhana pointed out this mistake of Droṇācārya's so that he might be alert and uncompromising in the fighting. By this he wanted to point out also that he should not be similarly lenient in battle against the Pāṇḍavas, who were also Droṇācārya's affectionate students. Arjuna, especially, was his most affectionate and brilliant student. Duryodhana also warned that such leniency in the fight would lead to defeat. (As-They-Surrender-Unto-Me ) (VTE)
Generally those who are very fond of material prosperity approach Lord Śiva for such benediction. The lord, being very merciful, quickly awards all the blessings the devotee asks of him. The demons take advantage of this leniency and sometimes take benedictions from Lord Śiva which can be very dangerous to others. For instance, Vṛkāsura took a benediction from Lord Śiva by which he could kill everyone he touched on the head. Although Lord Śiva sometimes very liberally gives such benedictions to his devotees, the difficulty is that the demons, being very cunning, sometimes want to experiment improperly with such benedictions. For instance, after receiving his benediction, Vṛkāsura tried to touch the head of Lord Śiva. Devotees of Lord Viṣṇu, however, have no desire for such benedictions, and Lord Viṣṇu does not give His devotees benedictions which would cause disturbance to the whole world.
The Lord is always prepared to excuse His devotee, but if a devotee takes advantage of the Lord's leniency and purposefully commits mistakes again and again, the Lord will certainly punish him by letting him fall down into the clutches of the illusory energy. In other words, theoretical knowledge acquired by studying the Vedas is insufficient to protect one from the clutches of māyā. One must strongly adhere to the lotus feet of the Lord in devotional service. Then one's position is secure.
After the night passed, however, Kaṁsa called for his ministers and informed them of all that had happened. The ministers, who were all demons, advised Kaṁsa that because his enemy had already taken birth somewhere else, all the children born within the past ten days in the villages within Kaṁsa's kingdom should be killed. Although the demigods always feared Kaṁsa, they should not be treated leniently; since they were enemies, Kaṁsa should try his best to uproot their existence. The demoniac ministers further advised that Kaṁsa and the demons continue their enmity toward Viṣṇu because Viṣṇu is the original person among all the demigods. The brāhmaṇas, the cows, the Vedas, austerity, truthfulness, control of the senses and mind, faithfulness and mercy are among the different parts of the body of Viṣṇu, who is the origin of all the demigods, including Lord Brahmā and Lord Śiva. Therefore, the ministers advised, the demigods, the saintly persons, the cows and the brāhmaṇas should be systematically persecuted. Strongly advised in this way by his friends, the demoniac ministers, Kaṁsa approved of their instructions and considered it beneficial to be envious of the brāhmaṇas. Following Kaṁsa's orders, therefore, the demons began committing their atrocities all over Vrajabhūmi.