A right-wing group that supports Israel's occupation policies hasaccused a Lebanese professor of "discrimination", saying that shediscriminated by refusing to accept their definition of antisemitism.If her actions fit that description, that does not make them wrong.What does or does not constitute discrimination is an objectivequestion and we must keep it objective.People of any group can well tell us about the forms thatdiscrimination against that group takes, and what the experience feelslike to them. The former is a matter of specific events which theysaw, and the second is a subjective matter of their feelings.However, no group in a free socirty can have the power to decide whatdoes or does not constitute discrimination against that group, becausein a society which prohibits discrimination in some situations, thatpower would be dictatorial power. The specific criterion fordiscrimination, where to draw the line, is a crucial moral questionwhich affects everyone's rights. Setting line too far to either sidecan cause injustice; indeed, setting it too far to either side cancause injustice _to you_. (You are part of some groups and youinteract with people in other groups.)The positioning of that line affects everyone's rights, so everyonemust have a say in it. We must abstract that definition from specificgroups so as to make a fair definition that is not biased towards oragainst certain specific groups.