I am absolutely not a fan of any religious group, let alone of such 'cults' like Falun Gong or Scientology. But I think a bomb threat or similar criminal tactics are unlawful, no matter what.

We must also clearly say that the only reason why China frequently intimidates these groups is not their cult-like status but because they don't pledge loyalty to the Chinese Communist Party. The CCP has apparently no problem to collaborate, for example, with the Chinese mafias overseas as they protect each others interests, and the Chinese party-state heavily engages with criminal groups abroad to achieve its strategic objectives.

Weird alien stuff or not, there is no justification for a bomb threat in Australia or any other country.