If you are an Arab and want to discredit your opponent, accuse them of collaborating with Israel.
We've seen it between Hamas and Fatah, and now we are seeing it between Syria and its opposition.
A couple of days ago a Lebanese newspaper wrote that Israel is working behind the scenes to keep Bashir Assad in power - over the objections of the French.
But today the Syrian government news agency writes that they found Israeli weapons in Homs!
It sounds like the entire Arab world is Zionist, if you ask the right people....
(Then again, some anti-Israel Jews like to accuse Arabs of being "collaborators" as well.)