An alternate view is that the industrial size importation of people from socially and culturally different countries over a compressed time frame can only lead to civil conflict and the degradation of the host nation. All the latter day Trotskys and Castros will argue against this until the real war breaks out and they realise that race or religion will be the dividing line, not comfy, inner city ideology. The savage breakdown of post-Tito Yugoslavia tells you all you need to know.
