Seems that upon brainstorming ways to "disrupt the Zionist narrative," Students Against Open Debate decided to tape onto their t-shirts loose-leaf paper scribbled with quotations about peace (since, you know, Zionists hate peace). After Richard Goldstone had his turn to speak to the mostly polite audience, and Dore Gold dared to start presenting his own views, the handful of activists stood up, removed their jackets and showed their righteous handwriting to the attendees sitting directly behind them.
After a quick rebuke by a moderator, they sat back down, undoubtedly satisfied that they've sufficiently promoted the ideal that people should act out disruptively when someone they disagree with is speaking.