Thousands of Hertha Berlin fans marched together to Berlin’s Olympic stadium in silent remembrance of club president Kay Bernstein, who died unexpectedly on Tuesday aged 43. The procession on Sunday morning took place before Hertha’s second division game against Fortuna Düsseldorf. The police spoke of a provisional figure of 7,000 participants. Fans were dressed in black or wearing a Hertha blue training jacket, which was Bernstein’s trademark. The president was a passionate Hertha fan and used to be an ultra. His death is being investigated by the public prosecutor’s office in Frankfurt an th…