I would prefer to see a completely secular state, in which all overt symbols of religious adherence are frowned upon, such as in France. However, France has its own difficulties with sections of the population feeling alienated and isolated from the mainstream. There's an article in today's Sunday Times about Gilles Kepel, a politics writer and lecturer who has become the subject of a fatwa.
Radical Islamist sects of the Salafist, Wahabi and Sunni variants are being fuelled through a proxy war on multiple levels between Saudi Arabia and Iran. It's a battle for the hearts and minds of the Muslim world across the Middle East and parts of Africa. Sadly, it has destabilised the region so comprehensively (with ill-judged interventions from the West and Russia) that it has caused the flight of refugees, as well as those people just fleeing poverty and lack of opportunity.
However, having made their corner of the world unsafe and untenable, some refugees bring their grievances and fights with them. Unless migrants relinquish their "baggage" and embrace the customs in their sanctuary, modifying their behaviour to conform, there will be resentment from the poor and ignorant indigenous populations of the countries which have opened their doors. I am often struck by the tendency of liberal elite types to mouth kindly platitudes while not experiencing any of the discomforts that accompany large scale attempts to re-settle an influx of strangers. In this county, we have some 30,000 second homes, and almost 20,000 people on social housing waiting lists; there would be immense resentment if even 50 refugees were accommodated ahead before them.