Yes, in some alternate comic storylines, Superman has been shown to kill the Joker.
In certain DC Comics variations, Superman has killed the Joker. However, this usually happens in alternate universes or special story arcs that deviate from the typical portrayal of Superman's character, who typically upholds a code against killing.
It could be that Joker posed an immediate and extreme threat to the safety of many, forcing Superman to take such a drastic action. Or perhaps there was a twist in the storyline that led to this unexpected turn of events.
Yes, in the Injustice comic, Superman does kill the Joker.
Superman might have killed the Joker out of extreme anger or a sense of justice gone awry. Maybe the Joker pushed him too far with his evil deeds.
Yes, Superman does kill Joker in the Injustice comic.
It could be due to a complex web of circumstances and motivations within the comic's storyline. Maybe there's a threat that forces Batman to take such a drastic action for the greater good related to Superman.
Superman killing the Joker in a comic can happen, but it's not a common theme. It might occur in alternate or darker story arcs where the circumstances push Superman to take extreme actions.
Superman kills the Joker because the Joker's actions pushed him over the edge. The Joker's latest scheme caused the death of someone very close to Superman, driving him to take extreme measures.
Yes, in some comic storylines, Superman has been shown to confront and potentially take extreme actions against the Joker.
Superman killing the Joker can happen when the situation gets really intense and justice seems to demand it. Maybe the Joker has caused so much harm that Superman feels he has no other choice. However, this goes against Superman's usual moral code, so it's a big deal when it happens.
Superman kills the Joker because the Joker's actions push him over the edge. The Joker causes a major tragedy that affects Superman deeply.