The reason why Broken Men only became Untouchables was because in addition to being Buddhists, they retained their habit of beef-eating, which gave additional ground for offence to the Brahmins to carry their new-found love and reverence to the cow to its logical conclusion.

One can quite understand vegetarianism. One can quite understand meat-eating. But it is difficult to understand why a person who is a flesh-eater should object to one kind of flesh, namely cow's flesh. This is an anomaly which call for explanation.

The food habits of the different classes of Hindus have been as fixed and stratified as their cults. Just as Hindus can be classified on their basis of their cults, so also they can be classified on the basis of their habits of food.

B. R. Ambedkar Quotes