Racism as a national security vulnerability

Back in September 2017 the president of the NAACP's Legal Defense and Educational Fund posted this:

How does this compare to a recent analysis of ads purchased by groups linked to Russian influence?

Expect foreign powers - Russia probably being the primary current example - to look for a society's vulnerabilities and aim to exploit them by playing both sides. It's the sort of principle that applies anywhere and to whatever those local vulnerabilities may be. Think divide and rule, though in the present environment I wonder if it might be better phrased as divide and disable.