Although at one point the Indic origin of kīla practice was widely questioned, Boord claims that "the existence of a Kīla cult among the Buddhists in eighth century India...must now surely be accepted as established" and further claims that it has been "conclusively demonstrated that all the basic doctrines and rituals of Vajrakīla had their origin in India."
Meskipun pada satu titik asal mula praktek kīla itu dari India banyak dipertanyakan, Boord mengklaim bahwa "keberadaan kultus Kīla di kalangan umat Buddha di abad kedelapan India...sekarang harus diterima sebagai mapan" dan klaim lebih lanjut bahwa itu telah "secara meyakinkan menunjukkan bahwa semua doktrin dasar dan ritual Vajrakīla memiliki berasal dari India."