The reference to Nuremberg was more for an example of an international trial than for the nazis, although faciliting a smaller scale genocide does somehow seem to have a relationship with the nazis...
Given the havoc they willingly caused to nations worldwide, an international trial for Zuckerberg and the other responsibles does not seem so inconceivable to me...
And that's not considering a lot of other probably less important things they did
Is your argument that Facebook as a whole is specifically engineered to incite tribal violence, and so should be banned on the same basis as radar scanners? Because in that case I think you have an argument to make which isn't completely incoherent.