Technically Lord Buddha's philosophy is called atheistic because there is no acceptance of the Supreme Lord and because that system of philosophy denied the authority of the Vedas. But that is an act of camouflage by the Lord. Lord Buddha is the incarnation of Godhead. As such, he is the original propounder of Vedic knowledge. He therefore cannot reject Vedic philosophy. But he rejected it outwardly because the sura-dviṣa, or the demons who are always envious of the devotees of Godhead, try to support cow-killing or animal-killing from the pages of the Vedas, and this is now being done by the modernized sannyāsīs. Lord Buddha had to reject the authority of the Vedas altogether. This is simply technical, and had it not been so he would not have been so accepted as the incarnation of Godhead. Nor would he have been worshiped in the transcendental songs of the poet Jayadeva, who is a Vaiṣṇava ācārya. Lord Buddha preached the preliminary principles of the Vedas in a manner suitable for the time being (and so also did Śaṅkarācārya) to establish the authority of the Vedas. Therefore both Lord Buddha and Ācārya Śaṅkara paved the path of theism, and Vaiṣṇava ācāryas, specifically Lord Śrī Caitanya Mahāprabhu, led the people on the path towards a realization of going back to Godhead.
We are glad that people are taking interest in the nonviolent movement of Lord Buddha. But will they take the matter very seriously and close the animal slaughterhouses altogether? If not, there is no meaning to the ahiṁsā cult.
Śrīmad-Bhāgavatam was composed just prior to the beginning of the age of Kali (about five thousand years ago), and Lord Buddha appeared about twenty-six hundred years ago. Therefore in the Śrīmad-Bhāgavatam Lord Buddha is foretold. Such is the authority of this clear scripture. There are many such prophecies, and they are being fulfilled one after another. They will indicate the positive standing of Śrīmad-Bhāgavatam, which is without trace of mistake, illusion, cheating and imperfection, which are the four flaws of all conditioned souls. The liberated souls are above these flaws; therefore they can see and foretell things which are to take place on distant future dates.