I tend to respond obnoxiously to comments that are themselves obnoxious. If you check my history on both Quora and HN, you'd see that I am much more active on HN than I am on Quora. I tend to use whatever medium gets the job done. Best tool for the job and all. When you actually start submitting things at all to HN, send me a message so that I can learn from the best as to what the "proper way" to do things are.
The post got a lot of views, so I would call that a success. Not sure what point you were trying to make there.
https://en.wikipedia.org/wiki/Belief_bias
https://en.wikipedia.org/wiki/Out-group_homogeneity
https://en.wikipedia.org/wiki/Stereotype