The state insures that every citizen live decently and earn his livelihood..?

The issue is far broader than this but yes that is one, of many, reasons to deport illegals. Keep in mind the German people are an Intelligent society and they obviously recognized the impact of illegal aliens on their society. I do not know where you got you quote from as most people would show it so I have some doubts as to its authenticity but I would have to agree with it. The key word is "citizen" and illegal aliens in the country are not citizens. We owe them nothing and they should get nothing. They are criminals and should be treated as such.