Something vaguely interesting in the wake of recent terrorist attacks.

[Burney]

I don't think there's a fine line between the two at all. You think the millions upon millions of Muslims across the world who hold fundamentalist views are mentally ill, including the masses of highly educated, highly functioning individuals among them?

Perhaps not so much a fine line as a grey area. Certainly, I would suggest that the Venn diagram between various types of mental disorders (from narcissism and psychopathy all the way up to paranoid schizophrenia) and religiously-inspired violence would contain a substantial degree of crossover. That isn't to say, however, that that absolves the perpetrators or the text that inspires and justifies them.