The London bombings, the Paris riots and, more recently, the cartoon controversy - Europe's Muslims are scarcely ever out of the news.
In this three-part series, Roger Hardy goes in search of the roots of Muslim alienation, asks if Muslim anger is justified or unjustified - and tries to gauge where Europe and its Muslims are heading.
Part One
Commentators are asking if Islam is compatible with Western values - and if a new generation of angry young European Muslims will become increasingly radicalised.
The first part begins in Leeds - home to three of the London bombers - and then moves to the Paris suburbs.
Young Muslims in both places share similar grievances, but these play out in very different contexts.
French "mono-culturalism" stands in marked contrast to British multi-culturalism - but have both failed?
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