Why is "Canadian Indian residential school gravesites" trending?

Wikipedia Overview

The Canadian Indian residential school system was a network of boarding schools for Indigenous children directed and funded by the government of Canada through the Department of Indian Affairs. Canada is a settler society which established residential schools aimed at assimilating Indigenous children into Euro-Canadian culture. The schools were administered by various Christian churches from 1828 to 1997. Students' bodies were often buried in school cemeteries to keep costs as low as possible. Comparatively few cemeteries associated with residential schools are explicitly referenced in surviving documents, but the age and duration of the schools suggests that most had a cemetery associated with them. Many cemeteries were unregistered, and as such the locations of many burial sites and names of residential school children have been lost. Over 4,000 students died while attending Canadian residential schools.