This attempt of damage limitation can't save Vance from being accused of inciting hatred in the worst manner imaginable. His lie is easily comparable with historic hate campaigns against Jews spreading rumours of them poisoning wells or murdering Christians to use their blood for religious rituals.
Pogroms against minorities have regularily been the outcomes of arousing aggressive emotions for political gains. In Germany the AfD is spreading hateful rumours against migrants and refugees with the effect that PoC aren't safe on the street anymore or their shelters are to be attacked by arsonists.
So hopefully this helps to weaken #Trump and #Vance so much that there won't be a worst case scenario of real fascism rearing its ugly head in the US.