PURPORT

When the demigods offered these prayers to Lord Siva, their inner purpose was to please him so that he would rectify the disturbing situation created by the halahala poison. As stated in Bhagavad-gita (7.20), kamais tais tair hrta-jnanah prapadyante 'nya-devatah: when one worships demigods, this is certainly because of deep-rooted desires he wants fulfilled by the mercy of those demigods. People are generally attached to the worship of demigods for some motive.