Protesting being denied a reason to protest

An article from the Chosun. 

Bereaved families of victims killed during a deadly rampage at a
front-line guard post, protest trial procedures in front of a martial
court in Yongin, Gyeonggi Province, saying that the trial was wrapped
up hastily, without doing anything to relieve people's distrust .
/Yonhap

And what grave injustice were these families of the slain protesting? Private Kim Dongmin was found guilty of premeditated murder and was sentenced to death. 

Meanwhile at the courthouse, bereaved families knocked chairs around
and yelled at the court in protest at the ruling, saying the military
had manipulated the case and the trial was wrapped up hastily.

Just can't please some people, I guess. That must have been a somewhat bizarre moment for the court when they realized the people throwing the tantrum were those that had the ruling go in their favor.

I know, it was a terrible trajedy and I shouldn't belittle them considering the immense pain and agony they must be going through, but isn't protesting a trial that went exactly the way you wanted it just a tad too much?

It's a Korean thing, I guess.

Anyway, the case will be appealed and in the end I'm sure Kim will just be sentenced to life, which is as it should be in my opinion. Let him spend the rest of his long life seeing if life in prison is a step up from serving 2 years in the military. Let him rot in prison long enough for his conscience to start gnawing at him once he's mature enough to see what he's done.