Why was it so difficult for people to determine whether Sai Baba was a Hindu or a Muslim?

Chapter 7 of the Shri Sai Satcharitra details the profound ambiguity surrounding Sai Baba's religious identity, making it nearly impossible to categorize him. If one called him a Hindu, he looked like a Yavana (Muslim) and resided in a mosque. Conversely, if one called him a Muslim, he bore the noble marks of a Hindu, had pierced ears, and allowed a sacred fire (Dhuni) to burn day and night in that same mosque. Further evidence states that while he appeared circumcised, which is a Muslim practice, his mosque was filled with Hindu rituals like the ringing of bells, blowing of conches, and worship from Brahmins. Ultimately, the text concludes he was a holy incarnation beyond both classifications.