If Superman has a do not kill supervillian's for any reason POLICY, how come he has tryed to kill Darkseid?

I have read seveal comics, and seen many different cartoon adaptions were superman's has actually tryed to kill this guy, either it looks like he Killed him in the comics or in the cartoon's was stopped by another Superhero, usually Batman or Supergirl. But if he is played so big on DO NOT KILL. then why is it Alright for him to Kill Darkseid?If Superman has a do not kill supervillian's for any reason POLICY, how come he has tryed to kill Darkseid?I couldn't began to write half the things Darkseid has done I wouldn't blame superman Darkseid killed many people he knew and got away with it. Darkseid has done many attempts on destroying Earth, and even once brainwashing Superman to destroying Earth, he just never gives up and he always tries to find a way to get what he wants and at the end he always manages to get away with it. For example Lex Luthor sometimes get's arested and braniac sometimes get's destroyed but Darksied just goes back home and sleeps as if nothing happened.If Superman has a do not kill supervillian's for any reason POLICY, how come he has tryed to kill Darkseid?Hell read the Public Enemies TPB sometime,he almost kills Lex Luthor in that one and what was worse Batman actually says that not only will he not stop Superman,but that there are ways to make it look like an accident and he could also make Luthor "disappear".



The only time I've ever known Superman to kill was Superman #22(1988),when he killed the Phantom Zone villains on a pocket universe Earth and then he felt he had no choice because there was really no punishment in the justice system that fit what they did(basically killing most of the inhabitants)and he knew that no jail would ever be able to ever hold them,thus Superman had no choice but to kill them!If Superman has a do not kill supervillian's for any reason POLICY, how come he has tryed to kill Darkseid?Perhaps he believed the ends justified the means. I dont think even superman could kill him. He is a god afterall.If Superman has a do not kill supervillian's for any reason POLICY, how come he has tryed to kill Darkseid?
oh dude writers have a little do not read what we wrote in the post POLICY and forget this stuff.