Muslims are the second largest community in Switzerland, they are granted upon their nationality all the rights of a citizen, thus their request should be dealt with as an internal swiss governmental issue, while here in arab world the majority of christians(if not all) are not citizens, they all are "visitors" with limited rights, therefore it's a long long process to think of building churches in arab world.
Comparing the situation of muslims in europe as citizens of the countries with the visitors christians in arab world is not accurate.

Yalla!