White people who love to quote Mandela but are now criticizing the protestors need to understand who Mandela was and why Mandela and the ANC had to turn their anti-apartheid battle into a violent movement:

Mandela in 1964: “when all channels of peaceful protest had been barred to us, that the decision was made to embark on violent forms of struggle...We did so not because we desired such a course, but solely because the Government had left us with no other choice”

This quote is from his opening of the defense’s case during the Rivonia trial, title “I am prepared to die” http://db.nelsonmandela.org/speeches/pub_view.asp?pg=item&ItemID=NMS010