I think this article hints at what may have been one of the causes of that change in direction. It appears that Russia faked black radical activism in social me

I think this article hints at what may have been one of the causes of that change in direction. It appears that Russia faked black radical activism in social media in order to intentionally sow division in the US. But that action plays into the larger current political climate where it's "either you're with us or against us" by default rather than "even if we don't agree on everything, let's make progress where we do agree."