Precisely,
Jack Layton seems to have associated with violent, out of control groups suc as the Anti-poverty Coalition and Anti Racist group; been photgograped addressing them in circumstances which later degenerated into violence such as the 'homeless' (one of whom later put a house up as bail) storming Queen's Park Legislative Assembly; and the disorderly picketing and attack on a house on Carlton St Toronto.
His activities in 1969 - organizing and participating in a riotous march on McGill Universtity, with a view to seizing the Admin Bldg, and turning a 200 year old school into a Fench only institution seem to find total media myopia. Here the leftist bias of Canadian media is painfully obvious.
http://www.jackLaytonsaid.com
has more details & news photos