If you want to talk about all that is wrong with Germany then you must start from the fact that it has the lowest birth rate in the world.
Now begin ...
Yep, you are correct on that. The birth-rate issue is probably the major driving force in the open-door policy. Doesn’t matter if you use university studies, German gov’t studies or private foundations...the evidence is always the same. The population will shrink to 65-to-68 million by 2045, from where it is today at 81-million.
It’s been going this way since the 1960s and nothing is about to change that.
There is no replacement workforce to support the social programs, right? As if the muzzies...so many of whom are illiterate not to mention rabid...would replace decent Western workers.
Why is the birth rate so low?
Importing millions of Moslems will certainly solve that problem. But oh, there's a little thing that comes along with that -- the complete destruction Germany. Suffering with a low birthrate until the the men can somehow find their testosterone again seems like a saner option. But if they absolutely MUST import some third world labor to continue to support the wussified welfare entitlement state they've created, then they'd be far better off importing some Latinos or Chinamen or ANYONE but Muslims, and give them work permits (but not citizenship). At least THEY aren't going to slash and burn the country to the ground.
Failure to reproduce is the central form of virtue signaling among the enlightened class. Better for the earth they will leave to the moslems.