Everyone is an 'other' in some aspect of their life. Almost all foreign teachers from Western developed countries are accustomed to living and working in a culture with diverse races, multiple languages, and complex interaction of cultural norms.
China, in its evolution to a developed country with global relationships, is particularly burdened in its international development process by an overwhelming uniformity of race, a powerful historic established culture, and a long-term initiative for common language and unitary government administration. For mainland Chinese nationals, almost all the world is the 'other'. Citizens of Europe, Canada and the United States represent almost every country of the world, including many Chinese. Chinese traveling overseas will seldom experience the racial stares that are commonplace in China and understandably surprising and sometimes disturbing to many Westerners traveling in China.
Adapting to life in China is surely difficult for many foreign teachers. There are several countries in the world (Japan, Israel, Saudi Arabia, ...) that possess a distinct unitary racial, cultural and religious heritage. Adapting to life in these countries is particularly difficult for foreigners that do not share these traits.
Blaming foreign guests for their difficulty in adapting to this situation is neither gracious nor accurate.