YC doesn't cross my mind while posting these. What has changed on HN over the last year or two is an uptick in nationalistic flamewar. That's happening because of larger social conditions we're all familiar with, but it has never been welcome on HN, and won't be as long as I'm moderating. That, btw, has nothing to do with which countries people are flaming about. It has to do with the purpose of this site—intellectual curiosity—being incompatible with tribalism.