Most weapons deemed inhumane are the sort of thing that would be about as unpleasant as being tortured to death. The de facto ban on poison gas in WW2, for example—if I had to choose between mustard gas and napalm, I’m not sure which way I’d go. For that matter, plenty of people are burned alive in ordinary wars(naval combat is particularly bad for that, along with the aforementioned napalm), and that’s never been deemed worse than any other death in any legal sense.
Also, all we know is that she was burned to death. Ordinary fire deaths are not the sort of torture you’re suggesting—they’re relatively quick in most cases(minutes, and not many of them), so 2) in particular doesn’t apply strongly.
Most weapons deemed inhumane are the sort of thing that would be about as unpleasant as being tortured to death. The de facto ban on poison gas in WW2, for example—if I had to choose between mustard gas and napalm, I’m not sure which way I’d go. For that matter, plenty of people are burned alive in ordinary wars(naval combat is particularly bad for that, along with the aforementioned napalm), and that’s never been deemed worse than any other death in any legal sense.
Also, all we know is that she was burned to death. Ordinary fire deaths are not the sort of torture you’re suggesting—they’re relatively quick in most cases(minutes, and not many of them), so 2) in particular doesn’t apply strongly.