>>112732000>SupermanBecause he is the embodiment of hope by example, he wants to help and teach people as much as he saves them. Killing his enemies undoes those lessons, and replaces much of that hope realistically with fear and scorn. He can do effectively whatever he wants, and he just wants to help. Killing wouldn't help, not in his eyes.
>BatmanBatman has a deep-seated fear of his own psychology. He knows theoretically he's one of the most dangerous people on Earth, and knows he has an addictive, dependent personality on the actions he's taken. He wants to help, to do good, but unlike the others he can't be completely assured of his own sanity. If he justified killing an enemy once, he would find it easier and easier to fall into that trap, and few people could stop him.
>WWHonestly the most confusing one. She's a warrior who trained to kill, the fact that she doesn't kill more often is weird if anything but I also understand she's a hero and wants to do the right thing as well. I know the least about her though.
>ShazamLiterally a child. Killing is wrong. Tends to follow the other's advice
>Flash(s)Just a guy who wants to help. Killing is above his pay grade and he's so broken in most cases that it really isn't necessary. Then again taking away other people's speed entirely seems more cruel than killing.
>GLEffectively a cop, as such is willing to employ lethal force but only if absolutely necessary, and in the grand majority of cases it isn't.