As Gunnar Heihnsohn has shown, and other statistics to which he refers also indicate, the deciding issue are birth rates. And Muslim migrants, social low class, uneducated, tend to have much hiugher birth rates than the native German academically educated upper class career woman. The numbers cannot be denied. To keep a population strength, women need to have 2.1 opr 2.3 babies. But the Muslim migration women statistically have a very much higher biorth rate, which means they do not maintain but increase their share in population, while the German native women andf the middle and upper class have significantly less than 2.1 babies, which means their share of the total population of the German state is decreasing.
It also means that the number of future social wellfare receivers is growing and the numbers of netto payers is declining.
Several Muslim politicians and clerics have explicitly described this as the way to continue where the military attempt to take over Europe has failed. Demographics now are the weapon to "outbreed" the Europeans, babies are the weapons in this kind of war. Societies of the West should be socially destabilised and made to collapse, the authority of the state erodes and weakens, and what remains is then easy prey for Islamic blackmailing and intimidation in order to have the West adopting it, else face open revolts and ungovernable cities. You can already see it in England, Netherlands, Germany, Denmark, where police procedures, language and legislation get gagged to avoid anything that could upset the strong and already very loud Muslim parallel societies. Especially the English are no longer rulers in their own house. Same is true for several cities in other nations as well.
Ironically it often are those apostate Muslim that flee from Muslim regimes like Iran, that warn the loudest of these things - and then get the mandatory beating by the political correctness brigade and the - mainly left-leaning -intellectuals that claim to know Islam so much better than Islam knows itself.
And the Germanic look of Germans - the link between Germans and the old Germanic tribes, is mostly a myth. Like we also are made to believe that it were out forefathers that under good ol' Hermann defeated the roman legions in the battle of the Teutoburger forest. But ethnologists say that the truth is we Germans have little to do with the Geranic people of that time, and in fact genetically as well as by cultural influence share much, much more with the Romans, than with the Germanic tribes. That ancient histpory era is very widely misunderstood, and currently gets rewritten anyway. Recent archeologic findings seem to give evidence that after the defeat the romans did anything but staying away, but had several punishing war expeditions into the Germanic forest in the twoo hundred years to come, and they moved much more North than was previously thought. Ands I think that reaction is much more in line with what we are used to think about the Roman military empire. It does not fit that they just should have left the place because one battle was lost and the rites and habits of the Germanic people were scaring to them. That they punished them and piushed even stronger into the enemy's territory, which seems to be shown by recent archeologic findings, fits the image we have of Rome much better. - Germans tend to think of the Germanic leader being "one of theirs", we even have a very big monument of him at Detmold, 2km away from the place were I was born.
But truth is we have little in common with him and his people, and we modern Germans are much stronger linked to the Romans. - We have just had a remembrance year, and there were several docus because of this on TV, about the battle at the Teutoburger forest. The history of the Roman-Germanic conflict must be rewritten. Rome was active in Germania muchg longer than was thought, and the defeat Varus suffered, was not the end of the Roman engagement. In fact, Rome moved further north after that than ever before.