This 29 June 2020 German video says about itself (translated):
Schalke fans protest against board member Clemens Tönnies
Football club fans have formed a human chain in front of the home arena in Gelsenkirchen. They demonstrated against the management of the association, which also includes meat entrepreneur Clemens Tönnies.
Translated from Dutch NOS radio today:
Controversial meat baron Tönnies resigns as director of Bundesliga club Schalke 04
Clemens Tönnies leaves as chairman of the board at Schalke 04 after almost twenty years, the German football club reports on its website. The 64-year-old businessman is under attack for the disappointing sports performance of Schalke 04 and the recent coronavirus outbreak at his meat factory Tönnies Fleisch.
Schalke 04 did not win the last sixteen Bundesliga matches, finished in twelfth place and again did not qualify for European football. It is the worst series in history. Even before the coronavirus crisis, the club from Gelsenkirchen balanced on the verge of bankruptcy. …
Two weeks ago, a major coronavirus outbreak was diagnosed at a branch of the Tönnies meat factory in Rheda-Wiedenbrück (in the state of North Rhine-Westphalia). More than 1,500 people tested positive in the slaughterhouse, making it Germany’s biggest source of infection.
According to the authorities, Tönnies violated the coronavirus rules, endangering the entire region. About 7000 people had to be quarantined. In the slaughterhouses of Tönnies, many foreign workers work under appalling conditions.
Mr Tönnies also got much criticism, including by Schalke players, for his anti-African racism.