4. Is it possible that the housemaid is more racist than the parents? Why or why not? Who is more to blame?

Your question requires an opinion. The following quote can be used to comment on the origin of the housemaid's fear.

She sent the trusted housemaid out with bread and tea, but the trusted housemaid said these were loafers and tsotsis, who would come and tie her and shut her in a cupboard.

The housemaid's feelings are a direct result of the previous event;

The riots were suppressed, but there were many burglaries in the suburb and somebody's trusted housemaid was tied up and shut in a cupboard by thieves while she was in charge of her employers' house.