It’s just a weight of horrors thing. Sure, a few white guys have been killed by black people shouting cracker. But if you compare that to the supposed inverse, the difference is essentially incalculably large. The very existence of chattel slavery, which was in many ways a very uniquely bad human atrocity, makes the gap impossibly large. Chattel slavery was like hyper Hitler giga slavery dude. It was unlike slavery throughout basically all of history in its cruelty and scope.