Complex sentence: Carradine's part was originally to be played by Bruce Lee but Lee was pulled at the last minute before airing for looking "too Chinese" for an American public accustomed to white actors portraying ethnic minority characters for a mainly white audience.
Split into simpler sentences: Carradine's part was originally to be played by Bruce Lee. Ironically, Lee was pulled at the last minute before airing for looking "too Chinese" for an American public accustomed to white actors portraying ethnic minority characters for a mainly white audience.