Ask HN: What is the relationship between AngelHack and Y Combinator?

Just asking because it seems that posts about AngelHack's CEO going on a rant have gone viral on social media ("Startup CEO Wishes Homeless 'Degenerates' Would Stop Ruining 'The Civilized Part' Of San Francisco ") and it's making the news, but quietly sinking away here on HN. Of course, perhaps HN folk aren't interested in the story, but given that the Google Bus Protest story made the front page, perhaps there are other reasons. Just enquiring, thanks.