>Killing thieves doesn't work for Africa 
Apples and oranges. 
Niggers are too fucking stupid to imagine consequences for their actions, so they'll keep stealing regardless of the risk. In a nation that used to be white that is becoming increasingly brown, such a law would effectively allow us to slowly exterminate all niggers, leaving only the law abiding whites. In Africa which is 100% nigger, they just breed faster than they're killed.