Question

Why did Buddhism vanish from India?

Answer 1

Buddhism largely disappeared from most of India with the Muslim conquest of the Indian subcontinent surviving in the Himalayan regions and South India when you Buddhist monks flat to Nepal Tibet and South India to avoid consequences of War

Answer 2

The decline of Buddhism has been attributed to various factors, especially the regionalisation of India after the end of the Gupta Empire (320–650 CE), which led to the loss of patronage and donations, and a competition with Hinduism and Jainism; and the conquest and subsequent persecutions by Huns, Turks and Persians.