Should this projected demographic shift worry non-Muslims?
Some controversial research suggests that an increase in the percentage of the Muslim population in a country correlates to increasingly aggressive rights-violating behavior from that population. Taken at face value, the numbers present a concern.
However, for Christians and Jews in particular, it would help to remember that minority status does not necessarily translate to domination. The early church was a minority from its conception and remained so for centuries.
Plus, when Christians look at their shared heritage with the Jews, scripture demonstrates that God reveals his sovereignty most dramatically when His people appear to be on the ropes. If a time of persecution approaches, we would do well to retain our faith – not in birthrates and conversions – but in God alone.