There are motives for school shootings. There are motives for terrorist attacks. There are no known motives (as of yet) for hi-jacking MH370.
What? This has a lot more plausible and structured motives than either school shootings or terrorist attacks. Whoever hijacked it has a Boeing 777 now. Not sure why that doesn't seem like a worthwhile task?
Yep. Esp. Considering they cost north of quarter Billion dollars a pop. I am surprised more aren't stolen!
your logic is in a complete freefall. Someone might have hijacked a plane (e.g. one of the pilots) with similar mental processes as a school shooting murderer.