Stop and Search by The Met police. Is it racist?

Nope. What would she say if only white people were searched when it is known for a fact that a wanted person is white and known to be carrying a weapon? The police would look stupid and be wasting their time by searching blacks when they are looking for him. We know that in many places, black gangs are carrying knives and guns and do drugs. No point targeting more white people in such places.