These details remain sketchy. When pondering the original alleged event, one must remember that this was undoubtedly a manual elevator which could easily be stopped between floors for as long as desired, and nobody could do anything about it. So it is possible that the white woman was raped by the Black kid.
And it is one thing to say that the "official" number of deaths was understated, but it is quite another to assume that the real number was virtually ten times as many as the official reports. Indeed, for the President to quote the number of 300 is nothing but an unsubstantiable lie. Perhaps we need to introduce the concept of BidenDerangementSyndrome, referring to when the President says something preposterous and the Media just takes it in as though it were plausible or real.
In any event, this was no "massacre." A "massacre" is an unprovoked attack on un-armed people, resulting is massive deaths. Here we had dueling mobs in which the larger, better armed white mob prevailed, then committed a little mayhem for dessert. Not a happy course of action, but not a massacre either.
And of course we now have the usual race hustlers trying to squeeze money from the government for events that the government had nothing to do with, and which impacted relatively few people (a couple dozen) in the actual event.