> millions of refugees that change the social fabric altogether
Note that there were slightly over 1 million applications for asylum in Europe in 2015 [1]. I can't find numbers for totals in 2016, but [2] has some raw statistics & charts. Note that these numbers don't account for migrants that don't apply for asylum (which could be a very small or a very large percentage, but is likely non-zero).
I can't speak for the "changing the social fabric" bit though.