i think the mad cow case is different than the other ones the article mentioned. it's highly likely canada WAS the source...this isn't something that was just made up to smear canada. whereas mysterious Arab immigrants who don't exist don't share the same realm of reality.
anyway, if not for Canada's lax immigration laws, some of my relatives would not have been able to immigrate to Canada from Poland and then sneak across the border to live here. so they're not ALL bad.