Isn’t the most important thing here that many people lost their lives. The next thing that stands out is that he was seeking psychiatric help, but was still able to buy semi-automatic weapons. However disturbed he was, his actions seem very disproportionate, and copycat in nature. He comes across on his videos as being melodramatic to the point of delusional. But none of that really matters. His actions do, and that he was able to do them.