Steyn fails to state the logical conclusion, which is that Muslim immigration must be stopped. Period.
But he is quite clear that the reason Europe can't stop the influx is BECAUSE of the Demographics. They litterally have not created enough kids to keep the wheels on the trains.
He also points out, at length, that this is made worse by the cradle to grave socialism that voters there expect. Stopping immigration would mean a huge cut in benefits to the coddled French and German citizens.
They have built a trap from which they can no longer escape.
Quite so. They're in a trap. It may be that there is no fix for them. It's too late for Europe.
Hence the title: "America Alone".