definition of concentration camp to be a place where people of disrepute with the authoritarians in power are interred for various hideous purposes.

I mean that checks out. EU countries barely if even have any kind of democratic mandate, a lot of real power in EU is held by bureocrats with little or zero accountability to peoples of Europe, and i would say that kicking out the refugees asking for asylum back to countries which are devastated/exploited in large part by Europeans, and where they would most likely face at least crushing poverty and at worst oppresion by regimes (Syria is pretty huge case) is pretty fucking hideous.