There is some selection bias and context that the OP had via Twitter (people following already kind of know him and his work, etc.) whereas HN evaluates his work solely on this one post.

Yeah, the correct stament should be something like:

Final feeling: My long time Twitter Followers & Friends are more engagement and kind than the anonymous programmers on HN.

Yeah, well, arrogantly complaining about people calling you out on unfounded speculation doesn't really work when you were originally quite arrogant in that speculation.

This is interesting to me. Maybe it's because twitter places much more emphasis on identity than HN comments? Twitter users are also more likely to be using that service to market their personal brand, rather than just to share whatever they're thinking, so are probably much more careful about what they say.

Twitter is better than HN? That's like comparing apples to a fish market.