Violence erupted in Northern Ireland last night in response to a stabbing attack in Belfast that was captured in a graphic video. Crowds, including masked men, burned vehicles and houses, hours after Elon Musk, Tommy Robinson and other agitators encouraged people to take to the streets. Nosheen Iqbal speaks to Ireland correspondent Rory Carroll – watch on YouTube. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>