The group AnonPS that claimed the attack, and tweeted:
I tweeted in response:
Pro-Palestinian hackers aren't too bright if their target is Haaretz: http://www.haaretz.com/news/diplomacy-defense/pro-palestinian-hackers-bring-down-haaretz-hebrew-website-1.409198
Apparently, the hackers ended up agreeing with me! They apologized:
Nice to know that Israel haters know who their friends are!
Meanwhile, the anti-Israel hackers attacked a couple of Israeli hospital websites. So moral!
In case you don't know, it takes zero skill to perform a denial of service attack. It is the cyber equivalent of having a hundred phones calling up the same phone number over and over again so that legitimate callers get busy signals. Calling this a "cyber war" is absurd; it is cyber-graffiti at worst.
(h/t Honest Reporting media cheat sheet)