I'm confused... somehow urinating on a dead body is worse than killing a live one? Poor judgement? - yes. Deserving of punishment? - yes. But, how harsh should the punishment really be?
I've seen people piss on other people's cars. I've seen them piss on other people's furniture and in their houses (yes, drunk people). I've seen people piss on other people from on top of buildings. I've seen people piss on all sorts of things (non-sexual) in a desperate show of machismo. All are lewd. All should be punished in some way.
But, I think if someone was trying to kill me and got killed instead, I might be tempted to "piss on their grave", too. and, we train these boys to use their adrenaline and testosterone to the max. Using a young man's life for political grandstanding is bad. Our leaders should publicly apologize. And, the country should decry the misconduct. And, the boys should be "adequately" punished. But, their lives should not be permanently ruined over this.