>>>To bring this back to the original point of press bias, it is noticable that the killing of an Israeli politician is reported in the Western media as an assassination, but the killing of Palestinian leaders is reported as being "in a strike by Israeli forces." <<<

Point taken, but in mitigation the distinction is semantically justified. Assassination is the murder of a socially prominent person. Military forces acting with state authority are not triable for murder. Actors without the color of sovereign authority can be tried for murder. Of course you'd need a Palistinian state to remove the imbalance, but then if journalists are supposed to use words according to their meaning and not play them to advance a political bias (i.e. what they consider "fair"), the different wording is linguistically appropriate.