I don't support the death penalty (normal European), but why don't they use nitrogen gas asphyxiation like in factory farms, as opposed to injecting people with whatever bizarre concoctions they think might work?
Because it would make people think of the Holocaust, if they gassed people. In fact there are many different methods which would easier, cheaper, more efficient and more human than the methods used now, but because the pro-capital punishment people think that the American people are fragile flowers, who can't deal with the death penalty unless it's made to look pretty and clinical, we're seeing this jokes of execution.