Kizaru basically co-signed Bonney's and Kuma's death warrant, right after Saturn.
That was a perfect opportunity for Kizaru to let Bonney and Kuma escape or at least try to make an escape. He could have pulled off a Fujitora and fought against Sanji the same way Fujitora did against Sabo to make himself appear occupied. Instead he cuts off the vacuum rocket tube and blocks escape access for Bonney and Kuma, and now they are about to get destroyed by the Pacifista (obviously someone will save them next chapter but that is irrelevant and has nothing to do with what Kizaru did this chapter).
He has firmly put himself with Saturn and stamped the death of a 12 year old. Even changing his mind in future chapters won't erase that.
That was a perfect opportunity for Kizaru to let Bonney and Kuma escape or at least try to make an escape. He could have pulled off a Fujitora and fought against Sanji the same way Fujitora did against Sabo to make himself appear occupied. Instead he cuts off the vacuum rocket tube and blocks escape access for Bonney and Kuma, and now they are about to get destroyed by the Pacifista (obviously someone will save them next chapter but that is irrelevant and has nothing to do with what Kizaru did this chapter).
He has firmly put himself with Saturn and stamped the death of a 12 year old. Even changing his mind in future chapters won't erase that.