"Please don't submit comments complaining that a submission is inappropriate for the site. If you think something is spam or offtopic, flag it by going to its page and clicking on the "flag" link. (Not all users will see this; there is a karma threshold.) If you flag something, please don't also comment that you did."
Without standing up and saying "no", there is no communication to new users of the do's and don'ts of the site, which including overtly political articles like this.
Put another way, the number of people interested in the Israeli-Palestinian conflict, and its importance in world events, far exceeds the number of people, and import, of "hacker news", so were the site to open its gates completely, articles like this would completely overwhelm what we came here for.
"Please don't submit comments complaining that a submission is inappropriate for the site. If you think something is spam or offtopic, flag it by going to its page and clicking on the "flag" link. (Not all users will see this; there is a karma threshold.) If you flag something, please don't also comment that you did."
[1] - http://ycombinator.com/newsguidelines.html