Is ISIS "Weaponizing" Immigration?

I was listening to my daily news and a point was brought up about how ISIS wanted a refugee crisis. I started to think about it. Then I realized they Weaponized immigration. What I mean by this is that their strategy is reaching much further than their controlled area. By pushing out so many people they are forcing other countries to step in and act. Jordan has erected tent metropolis' for them. They are financially draining the region. Just think of all the resources it takes. Now just look at these other countries were immigrants are fleeing in hopes of arriving in Europe. Some of them are going to Greece were they are already financially unstable. Now they are going to other countries in Europe and are drawing on their government for assistance. The more money any government spends on these immigrants they will only add to the instability of their own economy. The less stable a country is the less likely they will be willing to fight in the War on Terror, primarily ISIS. This is effective strategy. I didn't see it coming. There are no end of of immigrants that want to flee to Europe from any of the war torn countries.

This is a new tactic? What are the other implications? How would so many immigrants affect the make up of their new communities and country as a whole?