Justin Timberlake, who is currently more famous for writing family-friendly jams from kids movies and paling around with Jimmy Fallon than for churning out the soulful singles that made him huge a decade ago, typically only tweets when he has a new song out, or there's a natural disaster that needs his thoughts and prayers. However, he came out of his dad-cave to engage with the tweeters after the BET Awards Sunday night (June 26), and probably wishes he'd stuck with singing in an omelette costume.
Justin soon apologized with a "we are all one race" type of deal.
As I'm sure you might have guessed, his apology was not well-received. As many pointed out, Williams' speech was addressing Black people struggles — one of those being cultural appropriation, something of which Timberlake has been frequently accused, and the tearing down of Black women, which ties into the Janet Jackson thing — so using that to tweet out a storm of "we are all one race" stuff seemed more than a little bit misguided.
Anyway, the TL;DR here is that some people should stick to RT'ing compliments for "Can't Stop This Feeling" if they're not ready to listen to some painful truths about their own privileged career.