Thanks for understanding that it isn't my intention. I'm concerned that (some) terrorist events as portrayed in mainstream media could potentially be staged in order to manipulate public opinion. It is possible that some security services could have involvement in this manipulation.
Now it could be that these particular nasty incidents we are discussing are genuine acts of savagery committed by ISIS or whatever their current name is. I accept that these men could have been genuinely held as known hostages for a period of time and then killed by ISIS.
There is no way for me to know for definite either way from what I have seen. But what I am no longer prepared to do is to accept such things (as portrayed in media) without questioning or scepticism.
I understand your dilemma, although it's a fine line between scepticism and paranoia.
I guess it can be a case of believing that one action was politically orchestrated (The First Iraq War/Operation Desert Storm perhaps), therefore it is possible, or even likely in your view that history would repeat itself.
The difficulty comes when there are 10 genuine causes and one manufactured cause (or whatever numbers you want to use), how do you differentiate.
Personally I don't have the same concerns, but perhaps that would be different if I felt it affected me or my family in some way.

It's an interesting subject, but maybe not one with many answers?