The co-founder of Palestine Action has won a legal challenge to the home secretary’s decision to ban the group under anti-terrorism laws. Palestine Action was the first direct action protest group to be proscribed. The decision was widely condemned and was defied by a civil disobedience campaign, during which more than 2,000 people have been arrested. From July last year, being a member of – or showing support for – the group became an offence punishable by up to 14 years in prison. Lucy Hough speaks to the Guardian columnist Owen Jones