I think the key element we have to focus on is the intentions of the Islamic State. Let me just mention that Islamic laws require the giving of warnings to intended targets of jihad, of the Islamic religious warfare agenda. By the way, they always do that. They don't necessarily send it in English or French to particular email recipients, but they always issue a warning. One of the tasks of the intelligence community and scholars of terrorism is to monitor the discourse of the Islamic State and other terrorist groups.
In answer to your question, there's no question, absolutely none, that the Islamic State has threatened Canadian interests explicitly and directly. Whether or not the two individuals you mentioned were controlled agents of ISIS we will know only when our intelligence and security community publish the intelligence that they were able to collect and disseminate.
They won't do this now for reasons of sources and methods. We Canadians do not want Islamic State to know if we've penetrated them and how we've penetrated them, because we still want to get the intelligence.
There's no simple answer except that there is a direct and explicit threat to Canada.