The numbers just don't play out that way. This entire thing, the BLM movement, and the rest of the chaos it has engendered, is a lie.
I think the DNC thought it would rile up those darker folks in order to get them to vote Democrat, since without that unthinking voting in lockstep the DNC loses....and that they saw the polls last year and realized that decent hardworking folks of every race would vote for Trump because under his administration, they had what they wanted....a good job and some financial security.
So the DNC did what they could to "Stir 'em up". I mean, it worked for them in the case of Treyvon Martin.....But they forgot that Black people are intelligent. They can smell bullshit when you wave it under their nose often enough.