The Algonkin were not merely at war with Iroquois but often with each other. Disney simply twisted the fact. Remember, history documents Pocahontas' conversion to Christianity, not Smith's conversion to pantheism. They know that rational arguments do less to change consciousness than an incessant flood of ideas and impressions. Advertisers wouldn't pay millions for minute-long televised exposure if it didn't help sell their product.
Facts matters little compared to the perceived goodness and subjective feelings of the viewer.
Since Pocahontas majors in spectacular scenery, delightful animals, and feel good sentiments, its subtle seductions are difficult to resist. God calls His people be in the world but not of the world, to be missionaries but not mission fields, to share His love without compromising His truth. That love must point the way to Christ, not conform His message to the world. While this politically incorrect message may divide and disturb, we cannot change reality to fit popular beliefs. Pocahontas does just that.