Let me preface by saying I didn't see a thread addressing this specific discussion. What might his motive have been? If his motive was religious, then I would speculate that he became Muslim. No other faith in modern times engages in mass carnage in the name of their religion. If his motive was political, I would speculate that he has aligned himself with antifa based on the fact that he targeted a huge, country music concert. He could have been disgruntled with Las Vegas and used this as a way to punish the city. Or, he could have been jilted by a lover and used this as a way to lash out. Or he could have just been nuts, like the kid at Sandy Hook or like John Hinckley, who tried to kill Reagan to demonstrate his love for Jodie Foster.