Only if they didn’t report such a message/activity and fully cooperate.
My understanding is that if you are party to things like this and don’t take the required action then you are liable to this wider definition of making.
So you are essentially complicit in the making of them because you didn’t try and stop/report it in a timely manner.
Happens with loads of other stuff like murders, terror, theft etc… Basically if you know about serious crimes and don’t take any action. Then you can be found guilty of a very similar offence as the people who committed the exact offence.