Well, the reasons your FAO gives are practical issues that are related to different culture and behaviour patterns, and I would not call that entirely "racist".

On the other hand, to relate that to all "blacks" is racist again because it is an generalisation that again is based on appearance. It is probable that you can't expect anything else from an FAO, whether young or old, in a "third-tier" city that must be in the middle of nowhere. It's mostly there where decent "white" teachers wont like to go.