The lay-led petition highlights concerns over school teaching on marriage, gender ideology, and parental rights, accusing the bishop-backed guidelines of contradicting core Church teachings.
The three bishops are known as vocal critics of the German Synodal Way, which seeks to change immutable Church doctrine on marriage, sexuality, and human anthropology.
Cardinal Rainer Maria Woelki allegedly knew about allegations of sex abuse against a priest he promoted, which would contradict statements he made under oath.
The participants protested against abortion and euthanasia. Several bishops and politicians gave speeches in support of life, including a member of the U.S. Democratic party.
The eight orthodox bishops who voted against the document were Cardinal Rainer Maria Woelki and Bishops Gregor Maria Hanke, Matthias Heinrich, Stefan Oster, Dominikus Schwaderlapp, Rolf Steinhäuser, Rudolf Vorderholzer, and Florian Wörner.