So the facts of life are that the things which have provoked a minority of French or Danish Muslims to violence will continue to provoke them.

If you allow for those facts and if you have a solid and growing mass of five million Muslims you are bound to find among them many thousands who will be Islamic fundamentalists, who will go off to fight in Syria, Yemen, Iraq or elsewhere and who will also be prone to carry out anti-Semitic and terrorist attacks in their host nation. In practice, the state then finds itself powerless to protect its Jewish minority. All French Jewish schools and synagogues have been under armed guard for several years but this has not prevented continuing terrorist outrages. It seems very likely that Amedy Coulibaly was intending to attack a Jewish school and synagogue but ended up killing a policewoman instead before heading for the kosher deli, clearly in search of more Jews to capture or kill. Without any doubt the terrorists will succeed in making more French Jews flee.

Liberals tend to hope that their local Muslims will gradually become more integrated and more secular. This may happen in time but it will take several more generations. Long before that process is complete there will be no Jews left in France or Denmark. The real question is how many Jews there will be left in all of Europe. After all, the Muslim population is growing everywhere and the Jewish populations of most European countries are well educated and quite prosperous. They are thus highly mobile and can easily leave for Israel, Australia or North America.