Buddhism has never been a stronghold in India, because Hindus believed and accepted "Buddha" as the savior and great personality. So Hinduism embraced Buddhism and absorbed it.
But during the time of King Ashoka, Buddhism as a separate religion got fame. As Ashoka accepted it, and sent Buddhists to all parts of country and world to convert others. While some people of India accepted Buddhism, yet many didn't because they were already worshiping Buddha in Hinduism.
Then came Shankaracharya, Shankaracharya debated with Buddhists all over India and defeated all, his weapon was the Vedas. He clearly rejected the Idea of "Void" of Buddhism, and said that Ultimate reality was "Awareness" "Existence-Consciousness-Bliss" and not void.
He drove away Buddhism concept of Void, and concept of Awareness/Existence-Consciousness-Bliss as ultimate reality was proved by him.
Hindus did not copy Buddha, They worshiped him, they idealized him, and treated him as Great Personality.
But Hindus never went away from the path of Vedas, and hence they preserved their Originality.
The article is a paradox, because Vedas never had any reference to Brahmanism, Brahmanism was the concept of Puranas and Manu Charitra.
Vedas are only Meditation experiences.
Buddha never went against Vedas. He was just against Suffering.
Buddhism is a beautiful religion. Hinduism is beautiful too. Both are good, everything is good.