Defeated by fear
Right behind Quinn, everyone was watching him waiting to see what he would do. It was an important moment, but they trusted Quinn with whatever decision he was about to make.
At the same time, Bonny and Void were hot on the group's heels, filming every moment of what was happening. So far, Quinn had been calm enough to not kill anyone on board the ship.
'Will he also let Innu go, even after attempting to kill us all. Honestly, if it wasn't for Logan and Quinn back there, me and Void would have died as well!'
Quinn was furious, he could have snapped Innu's neck there in front of everyone, and he was angry enough to kill everyone involved as well, but he also knew that somewhere deep down, the soldiers were just scared and felt like this was the right thing to do in their minds.
However, a certain person had told them to pull the trigger, amplifying the fear of them all, and that was Innu himself.