The activists gave out bananas in front of the court and stated that Israel is not a banana republic of the High Court, that it is cut off from reality and considers itself an "omnipotent government."
The High Court is set to discuss about 15 petitions on Tuesday aimed at striking down the Jewish Nation-State Law as unconstitutional.
The Im Tirtzu activists also displayed a sign showing the court's judges with Islamic head coverings, stating that they act like the council of ayatollahs in Iran over democratically elected officials.
"The very discussion today of the legality of the Nation-State Basic Law seriously violates the principle of separation of powers, the rule of law and the democratic foundations of the state," said Matan Peleg, chairman of Im Tirtzu. "Now they also want to discuss her soul – her democratic character."This is an authoritarian debate that turns Israel into a banana republic and not a reformed state," he said. "We expect the elected representatives to emphasize in the upcoming election campaign the importance of restoring balance to the authorities – and especially to balancing the High Court."