I agree about the adults but I can blame both.
The teenager is on a trajectory to become a very capable person, technologically.
They are also behaving like a sociopath and may well be on a trajectory to cause an awful lot more harm than good in the world.
This event could have been a great teaching moment if it was handled by an adult with the capacity to execute on it.
Everyone sucks here and the future is.worse for.it.