In writing a story as big and intricate as this, there are gonna be plot holes or logic gaps, and none of us here could have written this as well as Hickman has so far, obviously, but the one concerning Sabretooth is a doozy.
Sleeping Giant (one can't help but imagine this is a spy in the ranks of Orchis) warns Xavier that Mother Mold is being prepped to come online so Krakoa needs to steal the Sol's Anvil blueprints ASAP. An eminently reasonable act of self defence.
PROBLEM 1
Why did Charles send self-named "evil mutants" Mystique, Toad and Sabretooth when (as someone above suggested) Kitty, Kurt and Logan could have done the job as well without loss of innocent lives?
For storytelling reasons, Hickman clearly did so to let Creed commit murder so that Emma could play the immunity card. But in-story? Can't see why...