There are a lot of very good European BKTB players. Also Chinese.
The great long distant runners are African because they run as part of their daily routine. Football is an American sport while socer, rugby are the big sports which black and other races are more on an equal level.
Referencing Hitlers ideology is no more less appropriate here than racial profiling.
A good deal pf how kids develop may have more to do with cultural and social economic issues. Kids growing up idolizing certain players may tend to excel in that sport given that they have the innate ability.