Literally none of that happened lol Agatha DIRECTLY refers to Wanda as a witch and having magic/spells. She never used the word "mutant" in relation...
The implication is that Wanda's probability powers allowed Pietro to not die from being exposed to the Mind Stone, like ever other test subject, and...
Ok, I just rewatched the scene. The Avengers find out Ultron killed Strucker and realize he knew something. Then they go through Strucker's files and...