Why do you think people are more concerned about the live streaming than the victims? Just because they’re against the live streaming?
Would you say that the army sergeant who was shot 7 times in this attack and says he played dead to survive needs his moral compass checked? Because he has said he doesn’t agree with the live-streaming of it.
He is in agreement with the death penalty and the firing squad for him, and said he’d watch in person as happens with other executions, just not in agreement with the live-streaming. I assume the live streaming is what you meant by “the way his correct sentence is carried out”, since that’s the main debate. I doubt his objections come from being more concerned about the way it’s carried out than for the victims, since he is one.