He does understand, it's you that doesn't. Racism involves power and hatred, Observational jokes are neither.
Not racist: Gao: But I thought 8 always went rather well with 7 and 2. A joke about Chinese using a numbering system in their takeaway shops in the West coupled with Saints player numbers.
Racist: Anything derogatory attempting to demean or degrade the Chinese, Swiss or Canadians in the photograph.