The Buddhists or other religionists who do not care for revealed scriptures sometimes say that there are many devotees of Lord Buddha who show devotional service to Lord Buddha, and who therefore should be considered devotees. In answer to this argument, Rūpa Gosvāmī says that the followers of Buddha cannot be accepted as devotees. Although Lord Buddha is accepted as an incarnation of Kṛṣṇa, the followers of such incarnations are not very advanced in their knowledge of the Vedas. To study the Vedas means to come to the conclusion of the supremacy of the Personality of Godhead. Therefore any religious principle which denies the supremacy of the Personality of Godhead is not accepted and is called atheism. Atheism means defying the authority of the Vedas and decrying the great ācāryas who teach Vedic scriptures for the benefit of the people in general.
Lord Buddha is accepted as an incarnation of Kṛṣṇa in the Śrīmad-Bhāgavatam, but in the same Śrīmad-Bhāgavatam it is stated that Lord Buddha appeared in order to bewilder the atheistic class of men. Therefore his philosophy is meant for bewildering the atheists and should not be accepted. If someone asks, "Why should Kṛṣṇa propagate atheistic principles?" the answer is that it was the desire of the Supreme Personality of Godhead to end the violence which was then being committed in the name of the Vedas. The so-called religionists were falsely using the Vedas to justify such violent acts as meat-eating, and Lord Buddha came to lead the fallen people away from such a false interpretation of the Vedas. Also, for the atheists Lord Buddha preached atheism so that they would follow him and thus be tricked into devotional service to Lord Buddha, or Kṛṣṇa.