When a Jewish terrorist kills Arabs - and let's be clear, this one's a terrorist - Jews condemn him for it. When an Arab terrorist kills Jews, Arabs celebrate.
When an Arab mob savagely lynches a Jew for killing Arabs, the world yawns. When highly trained and disciplined Israeli operatives target a Palestinian terrorist who is literally in the act of terrorism, it's highly "controversial".
After a horrific terrorist attack committed by a Jew, it's just kind of expected that Arabs will violently riot. When Arabs commit the most unthinkable crimes, bombing civilians and then the medical personnel who come to help them, Israelis are urged to consider the day after.
Mired in their own victim-hood, Israeli Arab organizations are of course calling for a full strike. In far more serious situations - with civilian murders sanctioned at the highest Palestinian levels - Israelis were always urged to make one more painful concession for peace.
And of course, the biggest difference is that when a Jewish terrorist kills Arabs, Jews call him a terrorist. When an Arab terrorist kills Jews, he's something else.

[Cross-posted on IsraPundit]

UPDATE: It's also worth noting, as emailer Hillel does, that this guy was a loner and not acting on behalf of any organization - let alone an organization recognized by (or worse, who negotiates with) the international community.

ANOTHER UPDATE: It looks like Natan-Zada was a member of Kach. Maybe not a lone, deranged lunatic after all. Something to keep an eye on, either way.