The Koran is the problem ... it establishes a non-negotiable brick wall (come to think of it all brick walls are non-negotiable, unless you have the skill to build a door or use a ladder ... or tie a bunch of explosives to your body and lean on it
), a bottom line, a point at which all rational argument fails. It's kinda like the US Constitution, an eighteenth century good idea most of which has had its day ... ok, I know the Koran's seventh century, give or take; but I hope you get what I mean. For most Christians (let's leave out the American Bible Belt)
, the Bible is, let's say "negotiable" ... a decent set of guidelines. As long as Muslims act as if the Koran is the final word, in fact the WORD of GOD, they ain't gonna fit into a society like Britain's.