I find you assessment of the power of morale disturbing.
Not to mention your inability to see extremes that indicate intent.
Counter-argument: they were keeping their own morale up.
Not to mention your inability to see extremes that indicate intent.
What extremes?
It's an empty coffin, they weren't actually on the detail (if they were, they'd be in dress uniforms).
There's far better things to be upset about than the posting of a meaningless picture of troops goofing around.