Semi-honest broker in Arab-Israeli issues

This reminds me of the title of an Egyptian movie from the 1970s: "A virgin but...".  "But you can't think you can succeed at that if you are in effect so biased one way or the other," he warned. "You cannot be Israel's lawyer and expect to solve the Palestinian/Israeli dispute… You have to be seen to be at least a semi-honest broker." (thanks Basim)