It must be kept in mind that there are strict laws in many States in India against Christian’s trying to convert Hindus. The Sisters of Charity no doubt walked a fine line between providing shelter, food, medicine and love to the poorest of Calcutta’s citizens. Many of whom were probably low caste. If officials thought the Sisters and Mother Theresa were using the aid they provided as a means of converting people they would have faced civil and/or criminal penalties. That is the most likely reason for her statements about people being good Christians, or Hindus or Muslims.
She’s a saint.
Satan certainly is pushing his insinuations and half-truths against Blessed Teresa.