An Israeli boy who faced relentless bullying and expected his bar mitzvah to be a lonely affair was surprised when 100 strangers turned up to celebrate with him.

Martin Kove has visited many schools to promote an anti-bullying message.

'We are glad to participate in a project that puts such an important topic at the front: creating a safer digital sphere for our kids,' the Israeli actress and her husband Jaron Varsano said.

'It kills children’s dreams and hopes every day and has already claimed the lives of children who did not find a way out of the suffering,' said Rivlin.

Israel's youth experience a surge of anti-Semitic belligerence online, but learn to fight back.