Referee Deniz Aytekin explained he showed a red card to Mainz coach Bo Svensson during the German Cup match against Bayern Munich because he and his team were insulted. “He asked loudly if we were blind. That’s not ok, we already endure a lot. We won’t let ourselves be insulted, that’s where the limit is for me,” Aytekin said after the match, which ended with a 4-0 win for Bayern. “We’re not the trash cans of the nation,” he stressed. Svensson saw a red card and had to leave the sidelines in the 81st minute. According to Aytekin, they had a chat after the match and “everything is fine, but at …