The Lord and His associates appear and disappear by the will of the Lord. They are not subjected to the laws of material nature. No one was able to kill the family of the Lord, nor was there any possibility of their natural death by the laws of nature. The only means, therefore, for their disappearance was the make-show of a fight amongst themselves, as if brawling in intoxication due to drinking. That so-called fighting would also take place by the will of the Lord, otherwise there would be no cause for their fighting. Just as Arjuna was made to be illusioned by family affection and thus the Bhagavad-gita was spoken, so the Yadu dynasty was made to be intoxicated by the will of the Lord, and nothing more. The devotees and associates of the Lord are completely surrendered souls. Thus they are transcendental instruments in the hands of the Lord and can be used in any way the Lord desires. The pure devotees also enjoy such pastimes of the Lord because they want to see Him happy. Devotees of the Lord never assert independent individuality; on the contrary, they utilize their individuality in pursuit of the desires of the Lord, and this cooperation of the devotees with the Lord makes a perfect scene of the Lord’s pastimes.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Third Canto, Chapter 03 – Text 15