Filled as they are with stories about vengeful Israelites in conflict with their neighbours, it takes little effort these days to find sensitive material in Handel’s great Old Testament-based oratorios. Jephtha, which has vengeful Israelites from start to finish, is a case in point. And although preparations for the recent Covent Garden staging will have started long before real-life events exploded in and around Gaza, the Royal Opera took considerable pains to relocate the piece a long way from the Near East and avoid all reference to Jews and Arabs. Visually, at least.