My understanding is that you cannot force any one to be a Muslim (I have a lot of Muslim colleagues and we discuss a lot), - "There is no compulsion in religion" Quran 2:256 - (I’m not talking about terrorist groups opinions - including the IDF / Zionist Israel who say they have a right to kill ALL including women and children), Im looking at source.
It would be helpful if you could provide a few passages 'commanding them to kill' from the Quran to back up what you say (I presume your information will be based on you having studied the context of the passages!)