The LV shooter is a) dead and b) had no motive. But I think think his wife was involved and terrorism is involved
My personal theory on the Las Vegas shooter was that he really did not have a motive.
You have this guy checking into venues overlooking large crowds all over the country, until finally he shoots at this crowd in Las Vegas.
My theory is that he liked to get into his room, set up all his rifles, and fantasize about shooting people. He got his gratification from the power.
So, he was up there in the room and the Mandalay, doing his thing, and he sees the security guard checking out the hallway. He figures the jig is up, and opens fire. Once he shot the guard, the decision was made and he starts firing out the window.
It could have happened there, or anywhere else, or never.