essentialize

verb

1. (transitive)To reduce (something) to its essence.
2. (transitive)To misrepresent (something) by oversimplifying a summary of its essence.

   ““This is an essentializing of Hinduism,” Ms. Narayanan said, “and the diversity of Hinduism in India is lost here.””

3. (transitive)To misrepresent (a characteristic of something) by falsely portraying it as essential to the whole (that is, implying that it defines the whole's essence).

   “to essentialize race by stereotyping "what Whites do" or "how Blacks think"”