That's the problem with the education system now. As we saw in the thread about teachers and unions using kids to further their agenda.
I can understand a teacher putting some of their life experiences into their lessons. I had a teacher that taught in Barbados who shared many of his experiences, we even swapped recipes for turtle soup. His for some species of sea turtle, mine for snapping turtle. I think it safe to say that he played a significant role in why I have an enthusiasm for ethnic foods and culture.
Conversely, I had a history teacher that generalized First Nations, as some do here. He believed every myth and stereotype. That affected his ability to teach Canadian/First Nations history in an open and honest manner. Just like those members here, are unable to discuss Canada/First Nations relations, open and honestly.