Reading GitHub's statements on the investigation, it seems the independent investigator they hired found no evidence that sexism at GitHub. The investigator did find issues with TPW's general professional behavior which is why he resigned.
> Sexism is a highly incendiary issue in this community. How did a case which apparently was not about sexism come to be so closely related to it?
I think you answered your own question there.
> Is the report from Github incorrect or was sexism used to market this to the watching population?
That is what we call a false dichotomy. I do not see how you have narrowed it down to those two choices, and it honestly seems like a veiled accusation.