Excerpt:
Pew published a new study on Muslim-Western tensions. There's a lot of interesting information in there, but I focus below on two issues: How Westerners view Muslim assimilation in their countries, and how they view Muslims in general. I think it's noteworthy that while in Western Europe there seems to be a correspondence between the two (Germany and Spain lead in thinking Muslims don't want to assimilate and in unfavorable views of Muslims), in Russia it's the other way around: they have a very favorable view of Muslims, though only a tiny minority think they want to assimilate.
Muslim Assimilation
France is the country in which the largest percentage believes Muslims want to adopt national customs: 45% think French Muslims want to embrace the French way of life.
On balance, respondents in the non-Muslim nations surveyed believe Muslims in their countries want to be distinct from the larger society. Majorities or pluralities hold this view in Western Europe, the U.S., Israel and Russia. This opinion is particularly widespread in Germany (72%), Spain (69%), and Russia (66%).