POLITICS: Virginia Tech Blasted Over Sex-Segregated Classes for Saudis

The classes were private, similar to private schools run by people of other cultures/faiths. Private schools in the US do separate classes by sex. Public schools will often do it with sports, for example you never see a gym teacher telling a girl to play against guys in basketball, football, or baseball.

People overlook segregation in their own cultures and are easy to blame others for doing the same.