If this raid sees deaths it will be insignificant fodders at the very very best one or two Scabbards dying, and Kin'emon will certainely not be one of them. The death toll in One Piece has always been very limited with people who should have surely died surviving and having long lives after, even Marineford had a very slim death toll.
Maybe unbeknownst to us they have been secretly immortals all along.