Hertha Berlin president Kay Bernstein has died unexpectedly aged 43, the German second division club said on Tuesday. “Hertha BSC are mourning the death of Kay Bernstein. The club received the terrible news on Tuesday that president Kay Bernstein has passed away unexpectedly aged 43. The whole club, its governing bodies and staff members are shocked and deeply saddened by the news,” Hertha wrote on social media platform X, formerly Twitter. The cause of death was not initially disclosed by the club. Bernstein, a passionate fan and former Hertha ultra, had been the club’s president since June 2…