I think that many of us have taken an allegation of how a nickname came about as fact. We don't know if it was given to him and he reluctantly went along to so as not to rock the boat. There could be many reasons.
"Yet Lumumba's experiences have been corroborated by six of his teammates. Andrew Krakouer, Leon Davis, Chris Dawes, Chris Egan, Brent Macaffer and Shae McNamara have all registered public support."
https://www.abc.net.au/news/2020-12...h-in-african-culture-collingwood-afl/12820942
I don't think it's wise to cast judgement from afar unless you were there or indeed, walked a mile in his shoes.
I see many on social media tossing out pragmatic tough-guy lines about this and that. Pretty bone headed if you ask me.