So, he defines 'migration' as movement that can't be controlled politically and 'immigration' as movement that can.
So free movement of Labour in the EU just encourages immigration (as 'migration' can't be controlled)?
Merkel's call also encourages both, no? Or, really, does the penultimate line give it away - it encourages non-European movement into Europe, which is what the author is really saying is 'migration' in this age.