Israel has no spies and terrorists working for it?

Notice that since 1948, Western Zionist media routinely scoff at any accusation by Arabs or by Iran against any Israeli spy/terrorist.  Even in the famous Lavon affair, and even in the case of Elie Cohen, Western Zionist media initially claimed that the men in question were innocent and even accused the Nasserist regime of anti-Semitism for rounding up an Israeli terrorist ring in Egypt.