These census numbers are good and bad.
For one, the survival of a culture is in peril every time that that culture's birth rate declines and eventually do not produce enough children to replace the people that retires and eventually die.
Here in the States, it isn't as bad as in Europe, because here the current trend in immigration and high birth rates are mostly latinos, that historically by the 2nd or 3rd generation become assimilated into the American culture, which is the culture established by the hard working customs of ethnic groups coming in from Europe.
Europe is a mess. The same as here, the French, the German, have very low birth rates and as a culture, they are disappearing because the immigrants occupying the void, are coming in with very agressive and traditional (theirs) cultures and religion and their descendents have been observed that instead of being assimilated into the mainstream of the European culture, end up imposing their culture and religion. Current census studies in Europe are projecting that by the year 2050, Germany will be an Islamic State. France's population is already 30% muslim and politically, a time bomb is already ticking as to when these groups will start influencing the results of elections to the extent of establishing or modifying the principles under which these cultures function (think Magna Carta, Napoleonic Law, Christian Cannonic law which establish the basic liberties and rights of the individuals).
Do you realize that just the act of writing my opinion (and you yours above), in "these" other societies could be considered a blasphemy or at least a crime of "lesa majestad"and subject all of us to prosecution?
In other words, we all have failed in not producing enough children to keep all our cultures alive in the long run.