Tantra is a developed present time relevant form of the vedic rituals. Even the rituals or sadhana using the five M’s or the Panch Makar is as per the rituals laid down in the vedas. But people who oppose tantra have chosen the panch makar sadhana to defame tantra.
After the battle of Mahabharta, tantra reigned supreme for about two thousand years. Later with the arrival of Buddha and Mahavira who propagated Buddhism and Jainism respectively, advocating the path of Ahimsa, people turned away from the path of tantra. A large number of Hindus were influenced by the two religions which opposed the principles of vedas. Thus hindus themselves were responsible for the destruction of the tantric path and its literature, thereby turning away from the vedas of Kaliyuga.