Good question...Some day in the not so distant future we will all be very concerned..At the rate the Muslims are expanding their system the whole world will be under their rule...That will be a major problem for anyone who is a Christian or has any other belief.All freedoms will be gone...For example the Western world has a population growth of 1.3 children per family where as the Muslims have a 8 plus per family..So it will not take many years to overwhelm the West.. So figure out how the numbers will add up over 50 years.Europ already has a few countries where the Muslims have taken control of the way they live.