Given that almost every potential migrant into Europe has reached a country where they are safe from war and persecution even before they get on a boat across the mediterranean, there is an argument to be made that most of the people now coming across the Mediterranean to Europe are in some sense "economic migrants".
What are you talking about? Unless I'm mistaken, most of the people crossing the Mediterranean are coming from Libya, which is also in the midst of a civil war / terrorist crisis (recall what the "L" in "ISIL" means).
You are mistaken.
1. Frontex statistics for 2015 show more than four times the number of migrants coming across the med from Turkey to Greece as from Libya to Italy.
2. Libyans are not even in the top ten nations of migrants coming across the med to Europe. The migrants setting out from Libya are overwhelmingly people from other countries who have chosen to go through Libya because it is a failed state which doesn't control criminal people trafficking.
3. The "L" in ISIL stands for "Levant", not Libya, and Libya is not usually treated as part of the modern Levant, although historically it was part of the wider Levant. There is a fairly recent and rapidly growing ISIS/ISIL presence in Libya, but that presence in Libya is not (yet) the cause of mass migration to Europe.