In those good old days without the Internet and social media, nobody except for some local newspapers took notice when that rather irrelevant Mr. Franz Ferdinand of Austria was shot in Sarajevo.
Archduke Franz Ferdinand Carl Ludwig Joseph Maria of Austria, younger brother of Emperor Franz Joseph I, heir presumptive to the Austro-Hungarian throne? You're obviously being sarcastic but it's hard to see your point. In the past the killing of nobodies like George Floyd would have been shuffled under the carpet. If the rich and powerful got killed, then you send nobodies to kill nobodies to avenge their deaths.
The latter is still true, how many hundreds of thousands have died for 9/11? Maybe it's the cynic in me but I think a lot of the upper class don't really care about Afghan deaths, Iraqi death or even US soldier deaths. They want their safe existence, far from any danger behind guards, gates and alarms but the destruction of the twin towers shattered that illusion of untouchability. Their only goal was to strike back so hard it'd never, ever happen again.
Now obviously they weren't the only ones who felt that, but many people and particularly the poor minorities runs the risk of dying every day at the hands of a cop on a power trip. And it's not like the second amendment is anything but an express ticket to the morgue against a paramilitary force in body armor. Camera phones, the Internet and social media is what make the nobodies matter. Sure MLK did it without all that, but he also got probably 0.01% documented.