Original:
British Man Who Helped Form Syria’s White Helmets Found Dead In Turkey
The clarion call of Statism - 'we are here to help'. We all grow up learning to take from our 'overlords', our parents. It is, therefore, a natural and deeply embedded impulse. We also grow up to learn that our parents don't always act entirely in our own interests at all times and that we have to forge our 'own path', based on our own life experience and aspirations. There are tensions and a 'give and take' that everyone can relate to. In times of difficulty and stress there may be a reversion to relying on the parent, that is greater than there would otherwise normally be.
I am, of course, making an analogy with entire States and, in this case, the 'stressed' State of Syria. This analogy can help to understand why, for example, in an entirely separate episode, the Russians refused aid from the UK during the Kursk crisis?

To avoid accepting a humiliating dependency.
Dynamics that cause rows, arguments, tensions, upsets etc. at a family level can be deadly at the State level. This view will be criticized for being over simplistic, of course. However, it is better to have a reasonable grasp of the overall dynamics than no grasp at all at that level and only a recognition of all the disparate pieces without the slightest clue how they fit together. States would prefer us not to understand the World in this, too easy to grasp, way. They all, to one degree or another, feed off the idea that we need them to 'protect us'. Without that, what are they other than a drain on the economy and an operation that is dangerously motivated to seek out and perpetuate conflict?

As an overview the analogy holds and it is one of the oldest Statist tricks in the book. Give us your money and then we'll decide what's best for you. You can even pretend you have a choice (voting) if it makes you feel better. This is how the funds are garnered. Consequently the State will go on to wrestle for control of larger areas in the wider World where it uses the same formula. Military force where possible, 'charity and assistance' where necessary (the choices, to a degree, depending on the political disposition of the population within the home State). Anything to create dependency.

(Let's 'debate' your 'Rights')
It's within the context of this broad overview that this man died. We're expected to believe that he was simply a 'good guy', doing his best for a humanitarian cause. Looking into the media propaganda value of these activities for Western States helps us to understand that it is that view which is overly naive and simplistic.
Statists are more straightforward when they perceive doing so to be in their own interests:
'Russian Foreign Ministry spokeswoman Maria Zakharova had accused Le Mesurier of being a former British agent who has “been spotted all around the world, including in the Balkans and the Middle East ... it is not difficult to assume what the British intelligence officer did there.”'
The Russians, as arch Statists, will be up to tricks of their own as well of course.

Cursory investigation (Wiki) reveals parallel operations to those undertaken by Le Mesurier, his front organization Mayday Rescue Foundation and the usual suspects such as USAID.
Like so many before him, he has died in a foreign land in which his State has an 'interest'. He has died for the State and everything it represents. Was it worth it?