What was Sai Baba's attitude towards caste distinctions and purity?

Sai Baba showed a complete disregard for caste distinctions and conventional notions of purity. Chapter 7 makes it clear that for someone surrendered to God, caste did not matter in the slightest. It states that he had no ego regarding the body and was the same to all castes, with no distinction of birth. This is powerfully illustrated by the fact that the 'best of Brahmins' and even Agnihotris (keepers of the sacred fire), who were typically very proud of their ritual purity, would prostrate before him. Furthermore, Chapter 7 describes his indifference to food purity, noting that his mind felt no disgust even if a dog were to put its mouth in the food. This demonstrates that he saw the divine in all and was entirely beyond social hierarchies.