Outside of Google Docs, the word collaborator refers to someone who cooperates with an enemy in a time of war.
Gazans in general and Hamas in particular consider themselves to be at war with Israel. Via the New York Times:
Masked gunmen in Gaza summarily executed a man here on Friday as a suspected collaborator with Israel on the third day of its deadly aerial bombardments, shooting him multiple times and leaving his body beneath a billboard featuring a Hamas fighter holding a rocket.
You’ll appreciate the exquisite care with which the “suspected” collaborator’s executioners carried out the deed, as described by an eyewitness:
“They took him out from the Jeep with his hands cuffed behind his back, they pushed him under the poster and fired three gunshots at his head from the back,” Mr. Mohammed said. “He was still alive. Then they set his cuffs free and turned him upside down and fired on him again.”
In the gentle, soothing words of the Times reporters, the shooting “evoked mixed feelings” among the populace, which apparently has a different conception of mixed feelings than we do, given our national hair pulling over the treatment of terrorists’ Korans in Gitmo:
“There were kids and children on the street,” said the witness, Mr. Mohammed. “They should have executed him in a far place.”
These are the people fighting Israel. These are the people who won’t stop until the Jewish state exists no more, even if millions of Arabs have to die in the process. So why does the world insist that Israel pretend coexistence is possible?