I can't be asked to not think about the ramifications of the stories I read, can I? "Proof"? I'm not making a ridiculous claim like "Storm totally forgave Emma off-panel, and that's why they worked together", I'm simply coming to a logical conclusion. Storm and her team have to sleep right? And there must be mutants they weren't able to reach. If she had saved everyone, there'd be no tension at the possibility that the Terrigen could kill innocents. And Medusa declaring the destruction or containment or whatever of the Terrigen an act of war makes the Inhuman royalty tyrannical and the X-Men cowards. I'm not calling Storm a killer, selfish, or evil, I'm saying that the way the story was written, at best Storm and her team come off as enablers, and at worst they come off as cowards.
Redemption doesn't have to be heroic or altruistic, if everyone who ever started on redemption wasn't heroic or altruistic they wouldn't be redeemed.
Okay, Storm and her team knew for months that "Cyclops" had been executed and they did nothing, mentioning him as a reason for the war was for Emma and for the narrative that the truth would come out. And sure, let's take the word of the queen who sanctioned an execution and allowed the deaths of innocent mutants to continue because the alternative would've inconvenience her people, I'm sure she would've destroyed the clouds if only the X-Men had asked nicely.
There were many lives on the line, she was the only person available, and Scott didn't direct her to kill. The situation didn't arise directly from Scott's actions, so he cannot be blamed for Idie being in that situation, and "giving her the decision" isn't the same as making her kill. Marvel wanted the readers to understand both sides, so the drove the point home that the X-Men would've been killed if not for Idie. This is not a black and white situation, which is what Marvel wanted.
Why do you take her word here but not anywhere else? Do you want me to admit that it was wrong for Emma to do that to Scott? It was wrong, he never would've wanted her to kill innocents. The "Scott" she projected in DoX was pretty true to the real man, but her actions and words in IvX do not represent him (and are out of character for her as well, in my opinion). It's silly that you or anyone would think otherwise. Don't hold so steadfastly to this idea that Emma was being honest here.
Everyone is different from each other, I'm not saying that her mental state should grant her forgiveness, I'm saying it should grant her understanding. Context matters.