[gardeniyas]

^that's not exactly jawdropping in Europe. There are hundreds of mosques in every major city, and the Muslim population is multiple times that of North America's (near 40 million compared to 3 million). As for France there are thousands of mosques all over the country catering to 6% of the French population.
However this Marseilles mosque is replacing the traditional role of the main cathedral now, as it's so large and will be much better attended by the majority of the population, that is France's second largest city. The right wing are obviously up in arms as some sign of things to come, and the 'Islamisization' of Europe theory. The reality though for all the Muslim immigrants pouring in, combined with the falling birth rates of the natives (not in France though where native birthrates are very high) - is still that the birth rates of the immigrant children fall dramatically within the generation, alongside the high incidence of intermarriage. This ensures natives in the long term will never become marginalised population-wise. This is without even mentioning the fact these children will change culture to their adopted country.

Look at UK as a good example historically and contemporarily, the Black population numbers in the millions (with some estimates that over a third of London is Black and half of all it's children born there have at least one Black parent), and is the second largest major racial minority, yet is still one of the most 'endangered', and liable to disappear altogether.

This is because of intermarriage, with more than half (80 percent of young Black men in some areas) marrying outside their community. The same with East Asian and European migrants, whilst South Asians and Middle Easterners are still pretty high too at 35-40% intermarrying. The fastest growing race is 'mixed race', much more so than the other minorities even with their immigration levels.

This is neither a modern phenomenon, the African community stretches back 2000 years, and Blacks numbered in their tens of thousands in the city by the 1700s; there were 3000 Indians already when the first Englishman set foot in India. However, these historical communities disappeared altogether due to intermarriage.

In retrospect today's London, touted by some as the worlds most cosmopolitan city, is still only now approaching levels of foreign born as in the medieval and Roman periods. Likewise today's immigration wave, as seen countless times before in European history, from centuries long Arab, Moorish, Mongol, Hun and Turkish conquests, to modern day world wars and frontier changes, will not upset the balance - it will just move with the times and transmogrify onward with European identity that has always been fluid yet intact despite the population upheavals.