If what is available about him online is correct, that he killed the author of a book that was a satirical work using the hadith because he was 'offended' or 'his sentiments were hurt', then he's a terrorist/murderer.
My views are not new - go back far enough in my posts and you'll find me taking the same position since I joined this forum. That doesn't mean I won't defend Islam (I have many times), but you won't find me defending those who use violence against others merely because their 'honor, feelings & sentiments were hurt' from things like words, articles, books, pictures or cartoons.