It is a term frequently used by leftists when they don't want to use the term 'racist' because
Pauline Hanson appeared on Sixty Minutes and responded to 'are you xenophobic?' with 'please explain?' The move was calculated to make Pauline Hanson look stupid and uneducated. It worked - she did. More importantly though it made interviewer Tracy Curro look like a member of the intellectual elite. Pauline picked up many votes that night.