Accepting the responsibility like she did is just a bunch of words. I can kill someone and say I accept the responsibility, that won't mean a thing if I'm free to do whatever I want anyway. Scott went to jail, he was ostracized by the X-men and had to be on the run, she did not and she was even giving speeches as if she didn't cause much of the pain that turned the X-Men into martyrs.
Schism has nothing to do with the speech. She was talking about the X-Men not following Xavier's dream anymore. If we want to contextualize her words, she sounds even more dumb because she's saying this after Decimation and Genosha. The X-Men had to face 2 genocide attempts, Purifiers, Nimrods, students being blown up in front of them, students and teammates being tortured in the worst possible ways, Bastion's attack on Utopia and the death and mauling of their teammates. She was shopping at local markets at the same time this was happening.
I've already explained a thousand times why Scott's situation is different from Wanda's and the X-Men have condemned Scott for what he did, even though he had no control over the situation. All the while (I'll say it again) Wanda was free, didn't stand trial and her teammates were accepting of her. Scott's teammates hated him for the whole duration of Bendis run, so don't make it look like Scott was all good after AvX, he went through what Wanda didn't even if she deserved it.
Sinister has nothing to do with Wanda and it doesn't really make the suffering any less. He's not an X-man, he's currently used for his skill as a genetist because they're not building a superhero team but a nation and he's there also to amen for what Wanda herself did.