He was unyielding, claiming that the most important hostage to him had been beheaded by them. The remaining three hostages were dispensable. If they could not even confirm the safety of the hostages with basic videos, then this deal was out of the question. They could do whatever they wanted with the hostages.
The man only said this to weaken the Sacred Temple's confidence.
They had thought that Alice and Natalia would be the two most important hostages for the Hurricane Group, and that Romanka and Hua Jin would be at the top of their execution list. Their original plan was to execute Romanka first to show their strength. If the Hurricane Group did not cooperate, they would then execute Hua Jin to pressure them to submit.
The man's words were nothing more than an act of nonchalance to make the Sacred Temple believe that the three hostages were not that important, thus weakening their arrogance.