The International Herald Tribune is very pessimistic:
"Germany, with its 3.2 million Muslims, is due for a hit. Despite its opposition to the Iraq war, Germany has some 2,000 soldiers operating in Afghanistan, and their presence is just as provocative to Al Qaeda as are American forces in Iraq.

One senior German officer told me that he could see the disdain in Afghan men's eyes as a young female German soldier directed them out of her way.

If interethnic tensions are potent in Italy and Denmark, they are worse in Germany. Most of Germany's Muslims hail from Turkey's less-developed hinterlands. Many do not speak German, live in predominantly Muslim neighborhoods and have limited social interactions with ethnic Germans. Their unemployment and high-school dropout rates are above the already depressing national averages.

Most disturbing, some surveys find that the younger generation of Turkish Germans express surprising hostility toward Europe and the West. In one study, the sociologist Wilhelm Heitmeyer and his colleagues at the University of Bielefeld found that almost one-third of those polled agreed that Islam must become the state religion in every country."
http://www.iht.com/articles/2005/07/14/opinion/edshore.php

@ Shah:

Perhaps Turks in Turkey are different from those living abroad. Isn't the diaspora of ever nation different?
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On suicide terrorism check out Fareed Zakaria:

"If you want to understand what motivates suicide bombers, watch the recent movie "Downfall." Based on eyewitness accounts, it chronicles the final days inside Hitler's bunker. In a particularly harrowing scene, Joseph Goebbels and his wife are given the opportunity to have their six young children flee to safety. But Magda Goebbels refuses and instead drugs the kids to sleep. Then she inserts a cyanide capsule into each child's mouth and presses the jaws until the capsule breaks. When explaining why she won't allow her kids to escape, Mrs. Goebbels explains, "I can't bear to think of them growing up in a world without national socialism." This is the power of ideology. Magda Goebbels had embraced a horrific world view that made her believe that murdering her children was a noble act. Suicide bombing cannot be explained by poverty and disadvantage. The London bombers were not the wretched of the earth. They came from working-class but comfortable backgrounds, living in one of the world's most prosperous countries. For all the talk of their being marginalized, none were living in hellish ghettos. Britain today does a decent job of assimilating its immigrants, certainly better than any other European country. If anyone had cause for rage, it was not the bombers but their parents. Muslim migrants from Pakistan (in three cases), they arrived in Britain in less multicultural times. They were dirt-poor and probably ostracized and persecuted. And yet they did not become murderers; they started fish-and-chips shops. Like all ideologies, radical Islam is a phenomenon of the educated class.

(...)

The invasion of Iraq clearly has greatly enraged many Muslims, radicalizing some deeply. But can a disagreement over foreign policy really make a Briton like Germaine Lindsay, who had never even visited Iraq, kiss his pregnant wife and child goodbye and go out and blow himself and others up?" http://www.msnbc.msn.com/id/8683395/site/newsweek/print/1/displaymode/1098/