I guess Spain started down this road when they stopped having babies. They will cut their numbers in half each generation with a birthrate of 1.1-1.2 children per woman. If the Muslims there are having 4 children per woman (just a guess) it probably means Spanish women are have a birth rate of less than one.
And NOTHING else they do matters if they don't have babies.
'are have' = 'have'. I knew I shouldn't check that box.