Racism was always there, at times it has been widely accepted in public, at its height in the 1920s the KKK had over 4 million members across the US.
What kicked off the current racist insanity in the US is that the country finally elected its first black president and the racists couldn’t pretend that they still live in a mostly racist country. Obama wasn’t just elected once as president he did two full terms.
Racists like trump did everything they could to destroy the Obama presidency while he was still in office and failed. Now they’re after his legacy, they want to make it like Obama was never in the Oval Office.
This will fail, all this obscene crap is doing is making it plain to the majority people who aren’t racist extremists just who is. And when the worm turns - which it always does - then these freaks will be so completely marginalized in society it will be like they never really existed.
Obama was trying to build something better, these sociopaths will destroy society if not opposed.