In Europe's defense, we're just about 60 years removed from a war that scarred the western world that was largely based on cultural intolerance.
They are doomed to relive part of that past one way or the other....they're going to have to subdue the radical muslims who aren't adapting somehow (whether that involves kicking them out or forcing them to behave forcibly...neither of which will be pleasant) or they're going to be overrun by the muslims, who will then proceed to persecute everyone in sight.
They are going to have to face it, but it's totally understandable why they're reluctant to do so given the scale and causes of WWII. I don't think they fully learned the lesson that delaying responding to a problem doesn't make it go away.
I don't think the US will accept that part-in England and France at least-as that would give them immediate access to deliverable nukes.