Vanderbilt University professor Michael Eric Dyson suggested Wednesday on MSNBC’s “Deadline” that white people could help the Black Lives Matter movement by holding their racist relatives “to account” at family gatherings such as Thanksgiving. Dyson said, “There are many things that white brothers and sisters can do. First of all, they can operate within their own sphere, within their own comfort zones. When you go home for Thanksgiving, and you know that there are some nasty viewpoints being expressed and you know that there are some vituperative expressions being made against Black people, you got to hold your family to...