But un-managed immigration is not a tenet of multi-culturism or open-culturism. It is a symptom of increasing wealth divide in a ever globalizing world. People from other parts of the world come to Europe in search of wealth and it is that powerful, they travel great distances in some of the worst conditions possible to get a glimpse of it.
I spoke about this with pater who commented thus; There has always been migrations, it's just that in the late 20th century there was very little, it was a blip, an abnormality. One that your generation thinks is normal.

Certainly made me think.*

*after an ouzo or two!