Dvau bhuta-sargau loke smin daiva asura eva ca (Padma Purana). There are two classes of menthe daivas and the asurasand there is a great difference between them. Kamsa, being an asura, was always planning how to kill the Supreme Personality of Godhead or His mother, Devaki. Thus he was also Krsna conscious. But devotees are Krsna conscious favorably (visnu-bhaktah smrto daivah). Brahma is so powerful that he is in charge of creating an entire universe, yet he personally came to receive the Supreme Personality of Godhead. Bhava, Lord Siva, is always jubilant in chanting the holy name of the Lord. And what to speak of Narada? Narada-muni, bajaya vina, radhika-ramana-name. Narada Muni is always chanting the glories of the Lord, and his engagement is to travel all over the universe and find a devotee or make someone a devotee. Even a hunter was made a devotee by the grace of Narada. Srila Sanatana Gosvami, in his Tosani, says that the word narada-adibhih means that Narada and the demigods were accompanied by other saintly persons, like Sanaka and Sanatana, all of whom came to congratulate or welcome the Supreme Personality of Godhead. Even though Kamsa was planning to kill Devaki, he too awaited the arrival of the Supreme Personality of Godhead (pratiksams taj janma).