You talk about Syria, Iraq, Afghanistan, and the first thing I notice is that when attacks like this happen, you can be assured that the perpetrators will have nothing to do with those actual places. In France and Belgium, they will inevitably be from Maghreb. What exactly do they have to do with Syria? With Iraq? With the Israeli-Palestinian conflict? And I get that there's a tremendous amount of racism and Islamophobia in France. I get that (mostly Maghrebi) Muslims are ghettoized in places where there are few jobs, few services, few educational opportunities. But not one of these perpetrators seems concerned about that. The statements have to do with things happening half way across the world that have no tangible connections with them.
That's not normal. Not it today's world. When there were Troubles in Northern Ireland, I don't recall it creating any tension in Canada. I don't recall people of protestant or catholic Irish origin(and there is a LOT of those in Canada) getting up in arms about what's going on over there. I don't recall my friends of Ulster Protestant stock seeing the Omagh bombing as something personally relevant to them. No rational person suspects Catholics of being more loyal to the Pope than to Canada anymore, either.
You can't ask why the world considers all Muslims the same when it seems like all Muslims consider themselves the same.