Organizers of a Munich demonstration against right-wing extremism have called off the event due to overcrowding, a police spokesman has told dpa. Police said the safety of the estimated 80,000 participants could no longer be guaranteed. Police had initially planned to accompany the demonstration with around 400 officers. Authorities had expected a crowd of about 25,000 at the Munich rally on Sunday. German cities have been swept by large protests for over a week after the release of an investigative report which revealed that several far-right politicians had attended a meeting alongside far-r…