118 points in 1 hour, page 3 of HN? This story is writing itself. The alt-right is not a small number of people. 50 million went to the polls and voted for Trump. And with things like this, you're giving them ammunition. You just told 50 million people that their views are not accepted in society. You just told the electoral majority that they are not allowed in one of the most common forums for political discourse.…
The story here is simply that politics don't belong on Hacker News, and users (rightly) flag stories like this.
IMO some debate is useful and it could also be good because we could flag out a few more people who like to dismiss others as "dumb racists".