So, have more diverse, multi-teacher classrooms and change the way we see the role of a teacher. Teachers shouldn't be anything more than facilitators for learning, and peacekeepers who provide a safe place for children to thrive.
Teachers of different ethnicities, trained in cultural sensitivity, trained to check their biases, able to respond sensitively to the needs of children with different ethnicities. Schools could stop just meeting "quotas" for racial diversity, and begin being palaces of diversity.
Takes effort, vision, and numbers.