This is the shoot the Boer, kill the boer song of Julius Malema. A song inciting genocide and condoned by Bono of U2 during the U2 tour in South Africa - as you can read in the telegraph:
"...He was aware of the furore the song had caused, he reportedly told South Africa's Sunday Times newspaper, but added that protest songs were legitimate parts of political activism. ....The controversial South African song includes a line "shoot the Boer" or "shoot the farmer", and prompted sustained debate after the murder of Eugene Terreblanche, a white separatist leader..."
http://www.telegraph.co.uk/culture/mu...
Also note that Malema shifts the pronunciation from "kill" to "kiss". Apparently the video was taken after a court decision against this song.
http://www.eugeneterreblanche.co.za/