If they simply wanted these people to improve their low birth rate, then it's a mistake. There are far more docile and easy to assimilate people out there that might want to come to Europe, for example SE Asians and Latin Americans.

I actually rolled my eyes when I saw a documentary showing how they try to integrate these people. They actually showed the men (even teens) having to be taught to RESPECT women. Glimpsed illustrations of different outfits on the screen. Probably telling them "just because you saw skin doesn't mean she's a slut". I remember there were incidents of women being groped in public spaces.