Europe has an immigration problem: they have too many un-assimilated muslims. The problem started in the 1970s when they loosened immigration rules to allow more cheap labor to enter Europe. As eastern Europe was still behind an iron curtain, the immigrants came from across the Mediterranean and were muslim. The children and grandchildren of these immigrants have chosen not to assimilate and are a fifth column for islamism and the caliphate. Coupled with immigrants from eastern Europe and the end of internal European borders since Schengen, and what Europe has is a major, existential crisis. (Chris Caldwell has just written a book about it: Bat Yeor wrote one several years ago. (SEE AMAZON LINKS BELOW)
The USA also has an immigration problem. We have 11 million illegal immigrants here now and more arriving everyday. Ours are mostly Latinos - they are mostly Christians.
I think we can kill twenty million immigration crisis birds with two stones:
The USA should deport ten million illegal Christian Latino immigrants to Europe and Europe can deport 10 million muslim immigrants back to their home nations. Europe gets the workers it needs - ones that are Christian and speak a European language, and rids itself of the fifth column for the caliphate. The USA reduces its labor force excess and wages start to climb for all workers.