You wrote that .... "This trend does not bode well for the futures of these countries and numerous others."
I agree. I think that one of the "numerous others" may well include the U.S. These European countries that you cite are currently our strong allies. Will they still be our allies by the year 2050? With the fundamental and dramatic changes in the make-up and religious beliefs of their populations, I think that it is quite possible that in 37 short years we (U.S.) may have quite a different (and more antagonistic) relationship with these current allies.... I hope that will not happen, but it seems quite likely to me.
Just my thoughts.