A video posted on social media afterwards claimed a group called People Against Genocide was responsible for the damage, the court heard.
Mrs Justice Cheema-Grubb set a plea hearing for 7 August and a provisional trial from 17 May 2027 at Leicester Crown Court.
Those charged are Peter Jones, 41, of Alderfen Way in Hoveton, Norwich, Michael Sackur, 28, of Maltings Place in Reading, Megan Kennard, 25, of Fircroft Avenue in Lancing, West Sussex, Seirol Davies, 31, of Godwin Road in Margate, Kent; Rhae Rivers, 39, of Godwin Road in Margate, Kent; and Hal Hockney, 27, of Alkham Road in Hackney, London.
Two of the defendants, Sackur and Davies, appeared in court by video link from custody with the co-accused on conditional bail and appearing in the dock.
The defendants indicated they would plead not guilty to the charges against them.