Wasn't he also considered something of a champion of the Aboriginal people later in life as well? Had a feeling he formed sporting teams or something similar?
Wills was a discerning man. He played with Aboriginals as children and learned their dialect and songs. The Aboriginal kids asked after him while he was schooling in England, where he helped cure homesickness by adorning his room with Aboriginal artefacts. Whether or not Wills undertook it as a money-making exercise, his later coaching of and playing with Aboriginal teams demonstrated he saw Aboriginals as individuals and not faceless, generic "blacks" or "natives".
In Queensland, Wills snr, relying on his experience with Victorian Aboriginals, felt he had succeeded in establishing friendly relations and was rewarded with having his brains beaten out. It is indisputable that Tom Wills hated
those Aboriginals and wished them dead. There is documented evidence that Wills recuperated at a nearby station while initial reprisals were carried out, with later justice effected under the auspices of the Queensland Native Police. It's
possible Wills may have been present at one or more of these sorties; there just isn't any evidence for it. Until now.
Which brings me to the letter itself. Rife with historical inaccuracies, the writer appears to be under the illusion that the massacre occurred at the family homestead in Victoria (and that Wills' entire family was killed and had their heads placed on sticks), whereas Wills actually arrived at the massacre site three days after the fact, whereupon the bodies had previously been given a quick burial on account of the fierce heat. This is almost enough on its own to disregard the letter or at least cast grave doubt on its bona fides. Elsewhere the writer compares Aboriginals unfavourably with kangaroos and other native animals and opines that the country is better for their thinning numbers (while being generally disparaging of Australians in general). The writer's anonymity, and the fact the letter was written more than 30 years after the massacre and 15 years after Wills' own death, IMO demands that its contents be taken with a considerable quantity of salt.
Like many historical figues, he had many enemies and wasn't without his flaws, however I'll be extremely disappointed if he's "cancelled" as a result of this flimsy and somewhat fanciful account.