Truly horrific.
The text that accompanies the image is so much worse than the image.
I had never heard of the state-sanctioned Belgian cut-off hand trade, and state-sanctioned child cannibalism and beheadings really takes it to another level.
It makes modern terrorism seem mild in comparison.
This is the sort of thing that should be taught in history classes.
Here is the map of British massacres in Australia that have written evidence (so you can double, triple the actual number). They have this right across their empire.
https://c21ch.newcastle.edu.au/colonialmassacres/map.php
If detail accounts I recommend reading "Conspiracy of Silence" a detailed account of massacres throughout colonial Queensland in Australia, the accounts and actions and just as horrifying.
https://www.goodreads.com/book/show/17674559-conspiracy-of-s...
While it is probably true, it is a woefully low bar to clear.
The Australian aborigines have clearly been treated appallingly. Whether it amounted to a deliberate genocide I don't know enough to say.
I had my awakening on this subject in my 30s, I started to read academic writing on colonialism. Having grown up in Australia and knowing colonial history having been learnt from the British perspective I was just shocked at my ignorance on British Empire and it's colonies was.