I don't entirely blame him. It's not his fault he has a mental illness and considering I don't know the severity of it I can't judge whether o not he knew he was the kinda of person to need help, o even knew what he was doing. And if any of his family o friends knew he needed help but didn't get him any it's there fault as well. It's honeslty too many lives lost, and his loss of life is also a tragedy.
Since he is autistic and has mental disabilities, I shall not hate him that much. But honestly.... why did his mother not bring him to a psychologist and get him checked out? Why did his mother collect pistolas in their house without even a simple keylock?