Thanks for the correction, I had forgotten the exact reason Bruce was persona non grata, and being part German would be all the reason needed.
Actually, William Cheung was the Si Hing to Wong. Wong was the best fighter, though. Bruce was discriminated for more than just being German. His parents were somewhat well to do and had influence in HK, he had a serious attitude as well. My Sifu is a student of Wong Long, who was a student of Yip Man.