Most people can live with refs making a mistake or not seeing something when it's 100 miles per hour.
But when it's a matter of getting the law wrong, or not applying their own policy/process it is a lot less paletable.
Pete Green did the wrong thing by requesting the game to be stopped when he hadn't been on the field to check Mitch Kenny. But the trainer isn't in charge of the match, the referee is. To me this is akin to a player saying "Knock on ref", and the ref saying "oh OK. Let's have a scrum then" - and then when it's revealed that the ref got duped, suspending the player.
I imagine the touch judge communicated to the ref to stop the game - and there was probably very little time in between that message being delivered, and the whistle being blown (so little, that the video ref was unable to intervene). In that case the touchie is to blame. He should have held his tongue, waited until the trainer got onto the field to the player, and then got on the mic to stop it. Probably only one more tackle for the Panthers to make to be fair.
The ref and touchie will go through untouched by this, and the NRL will make an example out of us - but it's an error made of their own design. The NRL have made a policy for trainer stoppages that wasn't followed properly (twice).