'Convert them or Kill Them' - A Christian said this. Isn't that the philosophy which just got 2 reporters beheaded?

http://www.dailykos.com/story/2014/09/03/1326776/-Hannity-scores-exclusive-interview-with-bearded-fanatic-who-declares-Convert-them-or-kill-them#?detail=facebook

What is the difference from ISIS and Mr. Christian - Phil Robertson?  They say the same thing.