THIS quiet, orderly man, who lives in a quiet, orderly house, in a very quiet tree-lined neighborhood has caused a huge public stir here with his volatile book arguing that Muslim immigrants in Germany are socially, culturally and intellectually inferior to most everyone else......“Some have said I argue that the achievements of immigrants from Muslim countries are lower because of genetic reasons; this is quite wrong,” Mr. Sarrazin explained, as if to cast off any taint of prejudice. “It has to be a matter of culture, and Islam is that culture.” Read more.