Who is pi’s Canadian aunti? What are hairless Christians?

From the text:

I know a woman here in Toronto who is very dear to my heart. She was my foster mother. I call her Auntieji and she likes that. She is Quebecoise. Though she has lived in Toronto for over thirty years, her French-speaking mind still slips on occasion on the understanding of English sounds. And so, when she first heard of Hare Krishnas, she didn't hear right. She heard "Hairless Christians", and that is what they were to her for many years. When I corrected her, I told her that in fact she was not so wrong; that Hindus, in their capacity for love, are indeed hairless Christians, just as Muslims, in the way they see God in everything, are bearded Hindus, and Christians, in their devotion to God, are hat-wearing Muslims.