Answer:
Why it should be abolished:
It's irreversible
It doesn't deter criminals
It's not 'humane'
It causes a public spectacle of someone's death
Explanation:
There is no evidence it deters criminals or reduces crime rates. (At least not compared to long term imprisonment) So it is an issue that it should or shouldn't be abolished because some will provide these facts, while others will come up with reasons to have the death penalty such as less cells are taken up in a jail.