Actor and producer Isaiah Washington, who famously joined the anti-Democratic Party #WalkAway movement earlier this year, said Monday that closeted conservatives in Hollywood are “cowards” for not voicing their beliefs out of fear of being blacklisted. “I have a message for the Hollywood Actors DM’ing me and revealing that you’re Conservatives,” wrote Mr. Washington, best known for his roles in the CW’s “The 100” and ABC’s “Grey’s Anatomy.” “Don’t DM me again, because you all are lame and I don’t respond well to hypocrites or cowards,” he wrote. “You’re no different than the bystander that is waiting on the blood...