It seems like France stands out among terrorist attacks in the news. Is it because they are more likely to be critical of Muslim culture than other European nations? Is it because there is a security failure allowing terrorist to come in and organize better?
Eastern Europe in general can be like that. You can have grandmas living next door to rich families.
That is slowly changing, however, as the rich move to secluded spots in the countryside, middle class moves to the suburbs and the super poor move to the dachas. The flats in the cities are still getting more expensive somehow.