Their intention is very clear. Isn't it? First the GCC and Turkey provoke a civil war in Syria, by providing advanced weaponry to the Islamic State and the Al Nusra. And when Syrian civilians flee the fighting, they divert them to Europe. Two objectives are achieved at the same time. The secular regime of Assad is replaced with an Islamist one dominated by Al Nusra, and Europe is converted to Eurabia.
A union of sovereign nations whose outer border is provided by a subset of those nations cannot stand against an external threat.
The European Union member nations are no longer sovereign. Important decisions such as border control and refugee policy are taken by the authorities in Brussels. Else, the Greeks would have closed their borders and kept the immigrants out of their cities and villages. Here is the paradox. The Muslim immigrants are there in Greece due to the EU policy. And at the same time the EU is refusing to help Greece to resolve this issue.