My own opinion on what?
Kid had mental issues…parents/school knew about…
There are mass murderers out there and as much as society does to try to stop or prevent them its going to happen.
Look at the bike path rapist he led what appeared to be a completely normal life to his family and a neighbors while killing people over a 10-15 year span.
These things happen and will keep happening there is so 1 answer to prevent this.
Everyone makes this big deal about trying to over analyze why he did this…in the end its done…people died…the shooter died…and as much time as people spend analyzing this it won’t stop it from happening again.