It is true that Siddharta Gautama spent of his life in India teaching his dharma. In his teachings, the Buddha retained many elements of the vedic religious teachings of India of his time, including the concepts of samsara and karma. However, the Buddhist differed from the vedic teachings in a sense that Buddha opposed the animal sacrifices. In addition the Buddha taught that anyone regardless of caste who followed the Eightfold Path could achieve nirvana. During his lifetime, the Buddha institutionalized his teachings by forming the sangha.  It is written that the Buddha lived till nearly eighty years and died under the sal tree in Vaishali.  It is also believed that the Lord Buddha died at the same day he was born. The last sermon before he died was quoted “decay is inherent in all component things; work out your salvation with diligence!” Nelson, 148.

Though Buddha can mostly attribute to be an Indian, he wasn't born in India. But he preached most of his time in India and he died in India too, this is a tuth. Very intesreting fact is that Buddhism existed and flourished in Nepal though by 12th-13th century, Buddhism had ceased to exist completely in India, the very place where Lord Buddha gaining enlightenment had preached his doctrines before he died. It was mainly due to Hinduism and Islamic domination and suppression of the Buddhist in India.