If some lumberjack had got drunk and minced the tiger with a chainsaw I think I'd have the same dim view of them.
Stupidity takes many forms. I do agree that what was done was stupid.
I wonder if for some reason a child had gotten away from their parents and the soldier had shot the tiger to protect the child whether you still wouldn't choose to dog the military?
I am sure that there are just as many idiots in the UK and your constant niggling at America is really sad. We should of course emulate your countries choices then we can say have New Yorks Catholics and protestants fighting each other for hundreds of years and do nothing about it.