Shield and Spear (DIR. Petter Ringbom) By: Parker Mott “Everything is political”, a group of South African artistes extol as mantra in Shield and Spear, which has its world premiere at Hot Docs.  This saying is called, in conventional wisdom, “The Activist’s Argument”;  it also resembles Ai Weiwei’s line that “art is politics” from his documentary Never Sorry (the latest documentary on the provocative Chinese artist, The Fake Case, is also at Hot Docs).