That string of attacks was determined to be a hoax, but I don’t know where that claim of Jews is coming from. Police claim the fake caravan bomb plot “was concocted by criminals who wanted to cause fear for personal benefit” so members could hand over evidence or information to reduce their prison sentences^[1]^. The named key suspects are associated with the Nomad bikie gang and included Sayed Moosawi (Arabic names) and Sayet Erhan Akca (Turkish surname and believed fled to Turkey, so I assume they’re most likely Turkish).

So unless I missed some announcement about these, I don’t think Zionists or other Jews were behind this hoax.