It's completely unacceptable we are still in this place. We should be well past an eminent academic not being able to talk about his research at his employing institution, especially at a place like Oxford.
Due to escalating disruptive protests, I have decided to cancel the remainder of these lectures. This is deeply lamentable, but the disruption has undermined the academic nature of this series. Students shouldn't face bullying or harassment when attending academic events.