Well the argument for extradition is based on the allegation that he did commit a crime in the US One need not step foot in a country to commit a crime in that country As for South Africa or Turkey or India or China or Brazil well different countries have different extradition treaties You may not have a particularly high opinion of the US legal system but the legislators of the United Kingdom apparently do which is no surprise as our legal system is based on theirs and actually in my opinion is an improvement upon theirs