I do not like how you consistently draw close parallells in between atheism and socialism, as if you have yet to reach the insight that they may differ vastly. I am an atheist and socialism makes me sick to the stomach, because I think it has a simplistic and inferior-theoretical view of how things work. It basically forgets that people are people; collectives are often weak structures driven by one individual or less. I also happen to know a bunch of actively religious (Islam, too) who consider themselves socialists. Your theorycrafting could use some work?
There are fundamentalists hiding around, who blindly speak on behalf of every decision that seems modern- which naturally does not equate to the "right decision". Personally I believe that we have abandoned the old teachings somewhat too soon, and missed out on a few benevolent features such as modesty and thinking before you act. I have been inclined that Islam is just as corpulent in this regard, though. There is always atleast something worthy of salvage.
What you need is contact with real immigrants- meet them in person. And study the Western societies for what they are; elude prejudice, read all sources- even if they do not further your opinion. Keep an open mind, try not to draw any conclusions before you have the proper data. Which is difficult, because we are just human.