Nobody had to tell Corrina Mehiel about the white privilege that killed her. It was a major focus of her life as a white Social Justice Warrior disguised as an artist. Earlier this month, that work took her to George Washington University in the nation’s capital. There she was part of a project drawing attention to one feature of white privilege or another. This time, lead paint in old houses occupied predominantly by black people. Just a few days after she was photographed with Nancy Pelosi grinning in approval, friends found Mehiel tied up, stabbed, tortured, and ultimately dead at...