In fact I would go so far as to say that the removal of borders, and the massive influx of immigrants, will lead to "civil war" in some EU countries.
In my area we had a St John Ambulance training centre that was no longer needed by them. It was taken over by Muslims as a "community centre" but soon it turned out it was being used as a mosque (without permission) causing massive traffic jams in the area.
The hate and bile and anger against Muslims in the area, and in the local media, was unbelievable, and eventually a man dumped some pigs heads in the door of the building.
While this is a small local case, it is just one example of growing tension between the "locals" and "immigrants".
Soon it will boil over (not sure which country) and we will have local riots eventually, then civil war. We have already seen protests in Germany and other counties, and it will get worse.
Europe is on a long downward spiral.