Babble has a forum for Feminist Activism and other areas, but none for the anti-war activists. The Anti-war movement in Canada is weak and divided between pro-NATO (Project Ploughshares) and anti-NATO
(Canadian Peace Alliance, COAT). R2P justifies Afghanistan and Libya to many on the Left. The Liberals got us into Afghanistan and the Conservatives, Libya but both had all-party support as with Yugoslavia.
(I've also posted this in Activist Toolkit with three positive replies)