When three young children and their carer were stabbed outside a school in Dublin, protests against immigration began, fuelled by rumours on social media. A night of rioting then followed, with shops looted, vehicles set alight, and police attacked. The rioting has placed immigration centre stage of Irish politics, with one of the country’s most famous sports stars, mixed martial arts fighter Conor McGregor, claiming Ireland is “at war” and saying he wants to be president. File on 4 investigates what caused the riots, and asks is Ireland at a turning point in its history? Reporter: Shane Harrison Producers: Fergus Hewison and Surya Elango Technical Producer: Sue Stonestreet Production Coordinator: Tim Fernley Editor: Carl Johnston