Robert Spencer has written a number of intellectually responsible (and courageous books) about the nature and history of Islam. He argues that the Islamic worldview is fundamentally different from the Judeo-Christian worldview. The former has no place for universal human rights, while the latter provided the basis for these rights in the West. Part of that Western patrimony is religious freedom, freedom of speech, and the rule of law.
Now Spencer is being blamed by some for the homicidal killing spree that recently stunned Norway. Why is this? Because the killer mentions Spencer many times in his writings. This charge against Spencer patently absurd, since Spencer defends the Western values of law, order, and tolerance all religions. The killer disavowed all of these principles affirmed by Spencer.