As far as I observe,as living and working in in muslim country,they have noway problem with christianity,In fact thery have more in common with conservative christians for things like fear of God, family values,virginity,etc, rather than secularist muslims.
I have never ever heart they put a ban on Gospel,except Saudi Arabia and/or Afghanistan for which we cannot blame more than a billion muslims who don't live in these countries.
But let me give you a secret. In the compound of Aramco in the city which I will not name, (the biggest of Saudi oil joint venture) there ''are'' churches.
Also ,in every american army base, based in problematic Islamic countries,they have churches,too.