It doesn't sound like you've reserved judgement at all.
GitHub, like any company, wouldn't say anything about an individual HR case.
We should be reserving our judgement of what happened - personally, I'll wait a month or two and ask GitHubbers what they actually think when I see them - but this isn't a professional way to handle something.
The person is obviously angry, so:
- get off Twitter
- chill out for a week
- think about getting a lawyer
if you believe you were harassed.