If this is true, then why hasn't Europe stopped all the wars in the middle east for that matter? Syria is right on Europe's doorstep.
In recent times there have 4 major cases of state collapse in the Middle East
1) - Iraq - This was caused by Western forces going in, including several European states. European armies stayed there for several years trying to stabilize it. When it seemed sort of stable they left. After the rise of ISIS around 10 European nations joined in a US led bombing campaign to support local forces.
2) Libya - Britain and France were leaders in the removal of Gaddafi when he threatened to wipe out the city of Benghazi. Although there hasn't been an military intervention in the most recent civil war both France and Italy are leading peace talks between to two sides
3) Syria - The US and Europeans backed several rebel groups fighting to topple Assad. For a long while there was talk of intervening to topple Assad after his use of chemical weapons but the Americans didn't really want to do it, Britain voted against it and France couldn't do it alone. Any major European or Western intervention was made impossible after Russia gave military backing to Assad.
4) Yemen - Too far for Europe to really care and has been out-sourced to allies in the region.
The lack of intervention by Western Powers in the Middle East is a result of the West's experience in Iraq & Afghanistan. Europe could easily defeat Assad or Gaddafi militarily and stop that phase of the war. The problems come after. Do European armies stay and been seen as an occupier which needs to be expelled militarily by insurgents or do they back an interim government that is often seen as a Western stooge which needs to be protected from its own people?
Faced with these choices most of Europe would rather not get involved or if they do it be limited to support for a local force. This obviously extends the wars though.