Let us send back every immigrant
And anthem our nationalistic tune 
(and ignore the old white elephant
who stands-unheeded -in the room)

This is about the requirement that prosperous consuming countries 
with aging populations will always need contiuous immigration in
order to replenish perishing consumers, replace perishing workers 
(skilled but-mainly-low paid ones), and finance the old age pension
costs of society...If (as is likely) they then adopt the reproducing habit
of the host country and turn into aging societies in their turn..then all
the immigration problems are likely (over time) to recur periodically.