Because you are no longer a threat.
Then why are you armed, dressed in camouflaged clothing, and trained and equipped to escape?
Look, in all seriousness, I have no great interest in entering this debate. I don't think the facts are really in dispute. It's not legal, it is predictable and it is to some extent understandable.
I would say that if I were to tool up as a news cameraman, go to the middle east, get snatched by the wrong people, and get beheaded on YouTube, I doubt many people on this forum would be wringing their hands over it. But they would probably watch the news, nonetheless.
P