Hint: It's NOT about Social Justice, Bringing in a New Era of Racial Equality, or Protecting Poor, Fragile, Little Snowflakes (who are, unlike real life, not exclusively White).
It's about a Naked Power Grab.
The Old Guard (1960s Leftists) have hung onto their power too long. The SJW leadership is tired of waiting for them to retire/die/fade away.
They have manufactured this take-over in the footsteps of Obama, who wrested power from the Old Guard Democrat Clintons, and are putting the Alinsky Handbook into practice in that effort.
They will likely be successful. Don't cheer their success, even though they finally rid us of the Clinton Dynasty.
Like the Bolsheviks, succeeding the Mensheviks, they will be worse - more ruthless, less bumbling, and more determined to eliminate ALL who oppose them.
BTW, for anyone who hopes that their particular cause will, at least, benefit from the change-over, lotsa luck. YOUR interests aren't even on the radar. This is about power, NOT fundamentally transforming America. Any transformation is simply a means to an end.