Grieving families who lost loved ones in the Bondi Beach terrorist attack have penned an open letter to Anthony Albanese, demanding a royal commission.

The Prime Minister has so far rejected mounting calls to launch a national inquiry into the December 14 attack, where Sajid and Naveed Akram allegedly opened fire on a Hanukkah celebration, claiming 15 innocent lives.

The loved ones of 11 victims have joined forces to write a blistering open letter to Albanese, blaming his government for the escalating threat of anti-Semitism in Australia.

They include the families of the youngest and oldest victims - 10-year-old Matilda and Holocaust survivor Alex Kleytman, 87.

The relatives of hero couple Sofia and Boris Gurman, Rabbi Eli Schlanger, Reuven Morrison, Edith Brutman, Tibor Weitzen, Yaakov Levitan, Tania Tretiak, and Boris Tetleroyd also signed the letter.

'You owe us answers. You owe us accountability. And you owe Australians the truth,' it read.

'We demand answers and solutions. We need to know why clear warning signs were ignored, how anti-Semitic hatred and Islamic extremism were allowed to grow dangerously unchecked and what changes must be made to protect all Australians going forward.'

The families argued that Jewish Australians now live in fear in the wake of the terrorist attack. 

The families of the youngest and oldest victims - 10-year-old Matilda (left) and Holocaust survivor Alex Kleytman, 87, (right), are among those who have joined forces to write to Anthony Albanese

Sofia and Boris Gurman (pictured) were also killed when they tried to disarm one of the alleged gunmen

'Our children feel unsafe at school and university. Our homes, workplaces, sporting fields, and public spaces no longer feel secure. It is an intolerable situation that no Australian should have to endure,' the letter reads.

'The rise of anti-Semitism in Australia goes far beyond one state jurisdiction. It is a national crisis that demands a powerful national response.

'The dangerous rise of anti-Semitism and radicalism in Australia is not going away.

'This threat is real and it is escalating.'

Mr Morrison's daughter Sheina Gutnick told Sunrise on Monday it was important for the families to band together and speak up.

'My father was murdered, leaving behind his wife, daughter and grandchildren. Matilda was murdered. Eli Schlanger was murdered leaving behind five children, including a six-week-old baby,' she said.

'So many families ripped apart with grandparents, parents, children just taken from their families.

'This is something that impacts all of us here in Australia.'