I think like most woolly liberals I have had to review my feelings over the last month or so. This action by the Captain could be viewed as Racist, HOWEVER, non-Racist people now have to perform racist deeds. In light of the awful events of Sep 11th self preservation MUST come first. Throw them off, get on with your flight, get on with your life.
Any Company MUST back the actions of their staff in these dark days, not to do so would be paramount to usurping the Captains Authority.