One of the Black Lives Matter protesters now facing felony rioting and misdemeanor graffiti charges — after a window-smashing free-for-all in Manhattan — is a wealthy Upper East Sider whose mother is an architect and whose father is a child psychiatrist. Clara Kraebber, 20, is one of eight people arrested Friday night after a roiling, three-hour rampage that police say caused at least $100,000 in damage from Foley Square up to 24th Street. “Every city, every town, burn the precinct to the ground!” the group chanted as it moved up Lafayette Street while busting the plate glass facades of banks,...