Tens of thousands of ultra-Orthodox Jews have held mass rallies in the Israeli cities of Tel Aviv and Jerusalem in anger over a school desegregation dispute.
Around 80 Ashkenazi parents face two weeks in jail for defying a Supreme Court ruling that forces their children to study with Sephardi jews.
Of European origin, the Ashkenazi Jews insist the two communities have very different traditions.
They want separate classrooms claiming the Sephardi jews, from middle eastern descent, are not religious enough.
The judge gave the parents until Wednesday to send their children back to the school in the occupied West Bank, but their refusal now means they are in contempt of court.