Star Wars: The Last Jedi teased moviegoers in second trailer about whether or not Kylo Ren would kill his mother, Leia Organa.
The novelization also mentioned that Kylo would have used the Force to stop that missile, but because it happened so suddenly, he was taken off guard.
After all, he had no issue stabbing Daddy Solo in The Force Awakens.
His wingmen, on the other hand, didn’t get the memo, destroying the bridge and killing everyone on board except Leia, who used the Force to guide her back to the inhabitable part of that ship.